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Finding the Fourth Proportional to 679.42, 1,013.92 and 606.52

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Solution

The fourth proportional to 679.42, 1,013.92 and 606.52 is: 905.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.42 : 1,013.92 = 606.52 : x
  2. Step 2: Convert to fraction form
    679.42/1,013.92 = 606.52/x
  3. Step 3: Cross multiply
    679.42x = 1,013.92 × 606.52
  4. Step 4: Simplify right side
    679.42x = 614,962.76
  5. Step 5: Solve for x
    x = 614,962.76/679.42
  6. Step 6: Final answer
    x = 905.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.