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Finding the Fourth Proportional to 615.59, 921.22 and 477.76

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Solution

The fourth proportional to 615.59, 921.22 and 477.76 is: 714.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.59 : 921.22 = 477.76 : x
  2. Step 2: Convert to fraction form
    615.59/921.22 = 477.76/x
  3. Step 3: Cross multiply
    615.59x = 921.22 × 477.76
  4. Step 4: Simplify right side
    615.59x = 440,122.07
  5. Step 5: Solve for x
    x = 440,122.07/615.59
  6. Step 6: Final answer
    x = 714.96

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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.