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Finding the Fourth Proportional to 717.32, 1,073.23 and 409.32

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Solution

The fourth proportional to 717.32, 1,073.23 and 409.32 is: 612.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.32 : 1,073.23 = 409.32 : x
  2. Step 2: Convert to fraction form
    717.32/1,073.23 = 409.32/x
  3. Step 3: Cross multiply
    717.32x = 1,073.23 × 409.32
  4. Step 4: Simplify right side
    717.32x = 439,293.48
  5. Step 5: Solve for x
    x = 439,293.48/717.32
  6. Step 6: Final answer
    x = 612.41

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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.