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Finding the Fourth Proportional to 624.89, 862.41 and 345.18

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Solution

The fourth proportional to 624.89, 862.41 and 345.18 is: 476.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.89 : 862.41 = 345.18 : x
  2. Step 2: Convert to fraction form
    624.89/862.41 = 345.18/x
  3. Step 3: Cross multiply
    624.89x = 862.41 × 345.18
  4. Step 4: Simplify right side
    624.89x = 297,691.21
  5. Step 5: Solve for x
    x = 297,691.21/624.89
  6. Step 6: Final answer
    x = 476.39

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Double scale
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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.