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Finding the Fourth Proportional to 623.84, 861.12 and 476.96

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Solution

The fourth proportional to 623.84, 861.12 and 476.96 is: 658.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.84 : 861.12 = 476.96 : x
  2. Step 2: Convert to fraction form
    623.84/861.12 = 476.96/x
  3. Step 3: Cross multiply
    623.84x = 861.12 × 476.96
  4. Step 4: Simplify right side
    623.84x = 410,719.80
  5. Step 5: Solve for x
    x = 410,719.80/623.84
  6. Step 6: Final answer
    x = 658.37

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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.