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Finding the Fourth Proportional to 539,240.80, 808,861.20 and 371,279.20

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Solution

The fourth proportional to 539,240.80, 808,861.20 and 371,279.20 is: 556,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,240.80 : 808,861.20 = 371,279.20 : x
  2. Step 2: Convert to fraction form
    539,240.80/808,861.20 = 371,279.20/x
  3. Step 3: Cross multiply
    539,240.80x = 808,861.20 × 371,279.20
  4. Step 4: Simplify right side
    539,240.80x = 300,313,339,247.04
  5. Step 5: Solve for x
    x = 300,313,339,247.04/539,240.80
  6. Step 6: Final answer
    x = 556,918.80

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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.