Home / 1,320,561.51-1,980,579.83-646,353.15

Finding the Fourth Proportional to 1,320,561.51, 1,980,579.83 and 646,353.15

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Solution

The fourth proportional to 1,320,561.51, 1,980,579.83 and 646,353.15 is: 969,401.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,561.51 : 1,980,579.83 = 646,353.15 : x
  2. Step 2: Convert to fraction form
    1,320,561.51/1,980,579.83 = 646,353.15/x
  3. Step 3: Cross multiply
    1,320,561.51x = 1,980,579.83 × 646,353.15
  4. Step 4: Simplify right side
    1,320,561.51x = 1,280,154,008,715.20
  5. Step 5: Solve for x
    x = 1,280,154,008,715.20/1,320,561.51
  6. Step 6: Final answer
    x = 969,401.27

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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.