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Finding the Fourth Proportional to 539,020.80, 808,531.20 and 381,427.20

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Solution

The fourth proportional to 539,020.80, 808,531.20 and 381,427.20 is: 572,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,020.80 : 808,531.20 = 381,427.20 : x
  2. Step 2: Convert to fraction form
    539,020.80/808,531.20 = 381,427.20/x
  3. Step 3: Cross multiply
    539,020.80x = 808,531.20 × 381,427.20
  4. Step 4: Simplify right side
    539,020.80x = 308,395,791,728.64
  5. Step 5: Solve for x
    x = 308,395,791,728.64/539,020.80
  6. Step 6: Final answer
    x = 572,140.80

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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.