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Finding the Fourth Proportional to 287,134.40, 430,793.40 and 87,492.80

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Solution

The fourth proportional to 287,134.40, 430,793.40 and 87,492.80 is: 131,267.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,134.40 : 430,793.40 = 87,492.80 : x
  2. Step 2: Convert to fraction form
    287,134.40/430,793.40 = 87,492.80/x
  3. Step 3: Cross multiply
    287,134.40x = 430,793.40 × 87,492.80
  4. Step 4: Simplify right side
    287,134.40x = 37,691,320,787.52
  5. Step 5: Solve for x
    x = 37,691,320,787.52/287,134.40
  6. Step 6: Final answer
    x = 131,267.17

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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.