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Finding the Fourth Proportional to 722.31, 1,084.07 and 654.27

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Solution

The fourth proportional to 722.31, 1,084.07 and 654.27 is: 981.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.31 : 1,084.07 = 654.27 : x
  2. Step 2: Convert to fraction form
    722.31/1,084.07 = 654.27/x
  3. Step 3: Cross multiply
    722.31x = 1,084.07 × 654.27
  4. Step 4: Simplify right side
    722.31x = 709,274.48
  5. Step 5: Solve for x
    x = 709,274.48/722.31
  6. Step 6: Final answer
    x = 981.95

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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.