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Finding the Fourth Proportional to 287,685.92, 431,459.59 and 88,008.04

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Solution

The fourth proportional to 287,685.92, 431,459.59 and 88,008.04 is: 131,990.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,685.92 : 431,459.59 = 88,008.04 : x
  2. Step 2: Convert to fraction form
    287,685.92/431,459.59 = 88,008.04/x
  3. Step 3: Cross multiply
    287,685.92x = 431,459.59 × 88,008.04
  4. Step 4: Simplify right side
    287,685.92x = 37,971,911,721.45
  5. Step 5: Solve for x
    x = 37,971,911,721.45/287,685.92
  6. Step 6: Final answer
    x = 131,990.86

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1.5x scale

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.