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Finding the Fourth Proportional to 287,584.90, 431,339.55 and 87,925.30

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Solution

The fourth proportional to 287,584.90, 431,339.55 and 87,925.30 is: 131,876.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,584.90 : 431,339.55 = 87,925.30 : x
  2. Step 2: Convert to fraction form
    287,584.90/431,339.55 = 87,925.30/x
  3. Step 3: Cross multiply
    287,584.90x = 431,339.55 × 87,925.30
  4. Step 4: Simplify right side
    287,584.90x = 37,925,659,335.62
  5. Step 5: Solve for x
    x = 37,925,659,335.62/287,584.90
  6. Step 6: Final answer
    x = 131,876.39

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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.