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Finding the Fourth Proportional to 287,792.08, 431,882.04 and 100,805.20

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Solution

The fourth proportional to 287,792.08, 431,882.04 and 100,805.20 is: 151,275.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,792.08 : 431,882.04 = 100,805.20 : x
  2. Step 2: Convert to fraction form
    287,792.08/431,882.04 = 100,805.20/x
  3. Step 3: Cross multiply
    287,792.08x = 431,882.04 × 100,805.20
  4. Step 4: Simplify right side
    287,792.08x = 43,535,955,418.61
  5. Step 5: Solve for x
    x = 43,535,955,418.61/287,792.08
  6. Step 6: Final answer
    x = 151,275.72

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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.