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Finding the Fourth Proportional to 487,476.32, 731,387.54 and 217,579.88

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Solution

The fourth proportional to 487,476.32, 731,387.54 and 217,579.88 is: 326,447.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,476.32 : 731,387.54 = 217,579.88 : x
  2. Step 2: Convert to fraction form
    487,476.32/731,387.54 = 217,579.88/x
  3. Step 3: Cross multiply
    487,476.32x = 731,387.54 × 217,579.88
  4. Step 4: Simplify right side
    487,476.32x = 159,135,215,559.11
  5. Step 5: Solve for x
    x = 159,135,215,559.11/487,476.32
  6. Step 6: Final answer
    x = 326,447.07

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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.