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Finding the Fourth Proportional to 287,988.60, 431,966.76 and 88,308.44

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Solution

The fourth proportional to 287,988.60, 431,966.76 and 88,308.44 is: 132,457.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,988.60 : 431,966.76 = 88,308.44 : x
  2. Step 2: Convert to fraction form
    287,988.60/431,966.76 = 88,308.44/x
  3. Step 3: Cross multiply
    287,988.60x = 431,966.76 × 88,308.44
  4. Step 4: Simplify right side
    287,988.60x = 38,146,310,707.45
  5. Step 5: Solve for x
    x = 38,146,310,707.45/287,988.60
  6. Step 6: Final answer
    x = 132,457.71

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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.