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Finding the Fourth Proportional to 696.93, 1,044.01 and 422.20

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Solution

The fourth proportional to 696.93, 1,044.01 and 422.20 is: 632.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.93 : 1,044.01 = 422.20 : x
  2. Step 2: Convert to fraction form
    696.93/1,044.01 = 422.20/x
  3. Step 3: Cross multiply
    696.93x = 1,044.01 × 422.20
  4. Step 4: Simplify right side
    696.93x = 440,781.02
  5. Step 5: Solve for x
    x = 440,781.02/696.93
  6. Step 6: Final answer
    x = 632.46

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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.