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Finding the Fourth Proportional to 917.27, 1,265.50 and 602.70

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Solution

The fourth proportional to 917.27, 1,265.50 and 602.70 is: 831.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.27 : 1,265.50 = 602.70 : x
  2. Step 2: Convert to fraction form
    917.27/1,265.50 = 602.70/x
  3. Step 3: Cross multiply
    917.27x = 1,265.50 × 602.70
  4. Step 4: Simplify right side
    917.27x = 762,720.06
  5. Step 5: Solve for x
    x = 762,720.06/917.27
  6. Step 6: Final answer
    x = 831.51

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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.