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Finding the Fourth Proportional to 287,891.61, 430,951.67 and 187,836.36

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Solution

The fourth proportional to 287,891.61, 430,951.67 and 187,836.36 is: 281,176.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,891.61 : 430,951.67 = 187,836.36 : x
  2. Step 2: Convert to fraction form
    287,891.61/430,951.67 = 187,836.36/x
  3. Step 3: Cross multiply
    287,891.61x = 430,951.67 × 187,836.36
  4. Step 4: Simplify right side
    287,891.61x = 80,948,392,793.93
  5. Step 5: Solve for x
    x = 80,948,392,793.93/287,891.61
  6. Step 6: Final answer
    x = 281,176.63

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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.