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Finding the Fourth Proportional to 624.02, 861.30 and 483.86

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Solution

The fourth proportional to 624.02, 861.30 and 483.86 is: 667.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.02 : 861.30 = 483.86 : x
  2. Step 2: Convert to fraction form
    624.02/861.30 = 483.86/x
  3. Step 3: Cross multiply
    624.02x = 861.30 × 483.86
  4. Step 4: Simplify right side
    624.02x = 416,748.62
  5. Step 5: Solve for x
    x = 416,748.62/624.02
  6. Step 6: Final answer
    x = 667.84

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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.