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Finding the Fourth Proportional to 742.87, 1,024.45 and 602.79

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Solution

The fourth proportional to 742.87, 1,024.45 and 602.79 is: 831.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.87 : 1,024.45 = 602.79 : x
  2. Step 2: Convert to fraction form
    742.87/1,024.45 = 602.79/x
  3. Step 3: Cross multiply
    742.87x = 1,024.45 × 602.79
  4. Step 4: Simplify right side
    742.87x = 617,528.63
  5. Step 5: Solve for x
    x = 617,528.63/742.87
  6. Step 6: Final answer
    x = 831.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.