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Finding the Fourth Proportional to 539,081.40, 807,941.70 and 272,915.40

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Solution

The fourth proportional to 539,081.40, 807,941.70 and 272,915.40 is: 409,028.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,081.40 : 807,941.70 = 272,915.40 : x
  2. Step 2: Convert to fraction form
    539,081.40/807,941.70 = 272,915.40/x
  3. Step 3: Cross multiply
    539,081.40x = 807,941.70 × 272,915.40
  4. Step 4: Simplify right side
    539,081.40x = 220,499,732,232.18
  5. Step 5: Solve for x
    x = 220,499,732,232.18/539,081.40
  6. Step 6: Final answer
    x = 409,028.64

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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.