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Finding the Fourth Proportional to 287,555.55, 431,385.17 and 98,005.43

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Solution

The fourth proportional to 287,555.55, 431,385.17 and 98,005.43 is: 147,025.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,555.55 : 431,385.17 = 98,005.43 : x
  2. Step 2: Convert to fraction form
    287,555.55/431,385.17 = 98,005.43/x
  3. Step 3: Cross multiply
    287,555.55x = 431,385.17 × 98,005.43
  4. Step 4: Simplify right side
    287,555.55x = 42,278,086,434.52
  5. Step 5: Solve for x
    x = 42,278,086,434.52/287,555.55
  6. Step 6: Final answer
    x = 147,025.81

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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.