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Finding the Fourth Proportional to 624.72, 861.84 and 484.88

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Solution

The fourth proportional to 624.72, 861.84 and 484.88 is: 668.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.72 : 861.84 = 484.88 : x
  2. Step 2: Convert to fraction form
    624.72/861.84 = 484.88/x
  3. Step 3: Cross multiply
    624.72x = 861.84 × 484.88
  4. Step 4: Simplify right side
    624.72x = 417,888.98
  5. Step 5: Solve for x
    x = 417,888.98/624.72
  6. Step 6: Final answer
    x = 668.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.