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Finding the Fourth Proportional to 474.12, 710.28 and 426.42

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Solution

The fourth proportional to 474.12, 710.28 and 426.42 is: 638.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.12 : 710.28 = 426.42 : x
  2. Step 2: Convert to fraction form
    474.12/710.28 = 426.42/x
  3. Step 3: Cross multiply
    474.12x = 710.28 × 426.42
  4. Step 4: Simplify right side
    474.12x = 302,877.60
  5. Step 5: Solve for x
    x = 302,877.60/474.12
  6. Step 6: Final answer
    x = 638.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.