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Finding the Fourth Proportional to 624.61, 861.98 and 359.05

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Solution

The fourth proportional to 624.61, 861.98 and 359.05 is: 495.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.61 : 861.98 = 359.05 : x
  2. Step 2: Convert to fraction form
    624.61/861.98 = 359.05/x
  3. Step 3: Cross multiply
    624.61x = 861.98 × 359.05
  4. Step 4: Simplify right side
    624.61x = 309,493.92
  5. Step 5: Solve for x
    x = 309,493.92/624.61
  6. Step 6: Final answer
    x = 495.50

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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.