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Finding the Fourth Proportional to 623.96, 862.08 and 477.44

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Solution

The fourth proportional to 623.96, 862.08 and 477.44 is: 659.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.96 : 862.08 = 477.44 : x
  2. Step 2: Convert to fraction form
    623.96/862.08 = 477.44/x
  3. Step 3: Cross multiply
    623.96x = 862.08 × 477.44
  4. Step 4: Simplify right side
    623.96x = 411,591.48
  5. Step 5: Solve for x
    x = 411,591.48/623.96
  6. Step 6: Final answer
    x = 659.64

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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.