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Finding the Fourth Proportional to 614.59, 921.92 and 399.54

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Solution

The fourth proportional to 614.59, 921.92 and 399.54 is: 599.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.59 : 921.92 = 399.54 : x
  2. Step 2: Convert to fraction form
    614.59/921.92 = 399.54/x
  3. Step 3: Cross multiply
    614.59x = 921.92 × 399.54
  4. Step 4: Simplify right side
    614.59x = 368,341.46
  5. Step 5: Solve for x
    x = 368,341.46/614.59
  6. Step 6: Final answer
    x = 599.33

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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.