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Finding the Fourth Proportional to 454.03, 624.87 and 355.61

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Solution

The fourth proportional to 454.03, 624.87 and 355.61 is: 489.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.03 : 624.87 = 355.61 : x
  2. Step 2: Convert to fraction form
    454.03/624.87 = 355.61/x
  3. Step 3: Cross multiply
    454.03x = 624.87 × 355.61
  4. Step 4: Simplify right side
    454.03x = 222,211.58
  5. Step 5: Solve for x
    x = 222,211.58/454.03
  6. Step 6: Final answer
    x = 489.42

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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.