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Finding the Fourth Proportional to 473.90, 709.92 and 422.30

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Solution

The fourth proportional to 473.90, 709.92 and 422.30 is: 632.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.90 : 709.92 = 422.30 : x
  2. Step 2: Convert to fraction form
    473.90/709.92 = 422.30/x
  3. Step 3: Cross multiply
    473.90x = 709.92 × 422.30
  4. Step 4: Simplify right side
    473.90x = 299,799.22
  5. Step 5: Solve for x
    x = 299,799.22/473.90
  6. Step 6: Final answer
    x = 632.62

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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.