Home / 646,210,151,961.42-969,315,228,008.72-215,947,236,699.28

Finding the Fourth Proportional to 646,210,151,961.42, 969,315,228,008.72 and 215,947,236,699.28

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Solution

The fourth proportional to 646,210,151,961.42, 969,315,228,008.72 and 215,947,236,699.28 is: 323,920,855,071.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,210,151,961.42 : 969,315,228,008.72 = 215,947,236,699.28 : x
  2. Step 2: Convert to fraction form
    646,210,151,961.42/969,315,228,008.72 = 215,947,236,699.28/x
  3. Step 3: Cross multiply
    646,210,151,961.42x = 969,315,228,008.72 × 215,947,236,699.28
  4. Step 4: Simplify right side
    646,210,151,961.42x = 209,320,944,979,015,622,459,392
  5. Step 5: Solve for x
    x = 209,320,944,979,015,622,459,392/646,210,151,961.42
  6. Step 6: Final answer
    x = 323,920,855,071.17

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.