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Finding the Fourth Proportional to 716.40, 1,073.16 and 459.36

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Solution

The fourth proportional to 716.40, 1,073.16 and 459.36 is: 688.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.40 : 1,073.16 = 459.36 : x
  2. Step 2: Convert to fraction form
    716.40/1,073.16 = 459.36/x
  3. Step 3: Cross multiply
    716.40x = 1,073.16 × 459.36
  4. Step 4: Simplify right side
    716.40x = 492,966.78
  5. Step 5: Solve for x
    x = 492,966.78/716.40
  6. Step 6: Final answer
    x = 688.12

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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.