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Finding the Fourth Proportional to 972.57, 1,451.37 and 868.77

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Solution

The fourth proportional to 972.57, 1,451.37 and 868.77 is: 1,296.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.57 : 1,451.37 = 868.77 : x
  2. Step 2: Convert to fraction form
    972.57/1,451.37 = 868.77/x
  3. Step 3: Cross multiply
    972.57x = 1,451.37 × 868.77
  4. Step 4: Simplify right side
    972.57x = 1,260,906.71
  5. Step 5: Solve for x
    x = 1,260,906.71/972.57
  6. Step 6: Final answer
    x = 1,296.47

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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.