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Finding the Fourth Proportional to 968.71, 1,451.75 and 621.87

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Solution

The fourth proportional to 968.71, 1,451.75 and 621.87 is: 931.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.71 : 1,451.75 = 621.87 : x
  2. Step 2: Convert to fraction form
    968.71/1,451.75 = 621.87/x
  3. Step 3: Cross multiply
    968.71x = 1,451.75 × 621.87
  4. Step 4: Simplify right side
    968.71x = 902,799.77
  5. Step 5: Solve for x
    x = 902,799.77/968.71
  6. Step 6: Final answer
    x = 931.96

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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.