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Finding the Fourth Proportional to 623.92, 861.32 and 483.72

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Solution

The fourth proportional to 623.92, 861.32 and 483.72 is: 667.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.92 : 861.32 = 483.72 : x
  2. Step 2: Convert to fraction form
    623.92/861.32 = 483.72/x
  3. Step 3: Cross multiply
    623.92x = 861.32 × 483.72
  4. Step 4: Simplify right side
    623.92x = 416,637.71
  5. Step 5: Solve for x
    x = 416,637.71/623.92
  6. Step 6: Final answer
    x = 667.77

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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.