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Finding the Fourth Proportional to 616.61, 923.70 and 454.41

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Solution

The fourth proportional to 616.61, 923.70 and 454.41 is: 680.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.61 : 923.70 = 454.41 : x
  2. Step 2: Convert to fraction form
    616.61/923.70 = 454.41/x
  3. Step 3: Cross multiply
    616.61x = 923.70 × 454.41
  4. Step 4: Simplify right side
    616.61x = 419,740.22
  5. Step 5: Solve for x
    x = 419,740.22/616.61
  6. Step 6: Final answer
    x = 680.72

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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.