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Finding the Fourth Proportional to 418.61, 624.72 and 372.48

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Solution

The fourth proportional to 418.61, 624.72 and 372.48 is: 555.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.61 : 624.72 = 372.48 : x
  2. Step 2: Convert to fraction form
    418.61/624.72 = 372.48/x
  3. Step 3: Cross multiply
    418.61x = 624.72 × 372.48
  4. Step 4: Simplify right side
    418.61x = 232,695.71
  5. Step 5: Solve for x
    x = 232,695.71/418.61
  6. Step 6: Final answer
    x = 555.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.