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Finding the Fourth Proportional to 487,872.64, 731,808.96 and 321,621.76

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Solution

The fourth proportional to 487,872.64, 731,808.96 and 321,621.76 is: 482,432.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,872.64 : 731,808.96 = 321,621.76 : x
  2. Step 2: Convert to fraction form
    487,872.64/731,808.96 = 321,621.76/x
  3. Step 3: Cross multiply
    487,872.64x = 731,808.96 × 321,621.76
  4. Step 4: Simplify right side
    487,872.64x = 235,365,685,698.97
  5. Step 5: Solve for x
    x = 235,365,685,698.97/487,872.64
  6. Step 6: Final answer
    x = 482,432.64

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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.