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Finding the Fourth Proportional to 700.20, 1,049.51 and 422.62

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Solution

The fourth proportional to 700.20, 1,049.51 and 422.62 is: 633.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    700.20 : 1,049.51 = 422.62 : x
  2. Step 2: Convert to fraction form
    700.20/1,049.51 = 422.62/x
  3. Step 3: Cross multiply
    700.20x = 1,049.51 × 422.62
  4. Step 4: Simplify right side
    700.20x = 443,536.56
  5. Step 5: Solve for x
    x = 443,536.56/700.20
  6. Step 6: Final answer
    x = 633.45

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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.