Home / 684,289,640.80-1,026,434,461.20-320,820,738.40

Finding the Fourth Proportional to 684,289,640.80, 1,026,434,461.20 and 320,820,738.40

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Solution

The fourth proportional to 684,289,640.80, 1,026,434,461.20 and 320,820,738.40 is: 481,231,107.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,289,640.80 : 1,026,434,461.20 = 320,820,738.40 : x
  2. Step 2: Convert to fraction form
    684,289,640.80/1,026,434,461.20 = 320,820,738.40/x
  3. Step 3: Cross multiply
    684,289,640.80x = 1,026,434,461.20 × 320,820,738.40
  4. Step 4: Simplify right side
    684,289,640.80x = 329,301,461,761,390,144
  5. Step 5: Solve for x
    x = 329,301,461,761,390,144/684,289,640.80
  6. Step 6: Final answer
    x = 481,231,107.60

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Double scale
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Similar ratio
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1.5x scale

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.