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Finding the Fourth Proportional to 287,909.59, 431,927.57 and 88,245

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Solution

The fourth proportional to 287,909.59, 431,927.57 and 88,245 is: 132,386.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,909.59 : 431,927.57 = 88,245 : x
  2. Step 2: Convert to fraction form
    287,909.59/431,927.57 = 88,245/x
  3. Step 3: Cross multiply
    287,909.59x = 431,927.57 × 88,245
  4. Step 4: Simplify right side
    287,909.59x = 38,115,448,414.65
  5. Step 5: Solve for x
    x = 38,115,448,414.65/287,909.59
  6. Step 6: Final answer
    x = 132,386.87

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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.