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Finding the Fourth Proportional to 624.67, 861.51 and 493.45

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Solution

The fourth proportional to 624.67, 861.51 and 493.45 is: 680.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.67 : 861.51 = 493.45 : x
  2. Step 2: Convert to fraction form
    624.67/861.51 = 493.45/x
  3. Step 3: Cross multiply
    624.67x = 861.51 × 493.45
  4. Step 4: Simplify right side
    624.67x = 425,112.11
  5. Step 5: Solve for x
    x = 425,112.11/624.67
  6. Step 6: Final answer
    x = 680.54

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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.