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Finding the Fourth Proportional to 614.72, 922.72 and 478.56

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Solution

The fourth proportional to 614.72, 922.72 and 478.56 is: 718.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.72 : 922.72 = 478.56 : x
  2. Step 2: Convert to fraction form
    614.72/922.72 = 478.56/x
  3. Step 3: Cross multiply
    614.72x = 922.72 × 478.56
  4. Step 4: Simplify right side
    614.72x = 441,576.88
  5. Step 5: Solve for x
    x = 441,576.88/614.72
  6. Step 6: Final answer
    x = 718.34

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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.