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Finding the Fourth Proportional to 717.13, 1,074.95 and 306.53

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Solution

The fourth proportional to 717.13, 1,074.95 and 306.53 is: 459.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.13 : 1,074.95 = 306.53 : x
  2. Step 2: Convert to fraction form
    717.13/1,074.95 = 306.53/x
  3. Step 3: Cross multiply
    717.13x = 1,074.95 × 306.53
  4. Step 4: Simplify right side
    717.13x = 329,497.52
  5. Step 5: Solve for x
    x = 329,497.52/717.13
  6. Step 6: Final answer
    x = 459.47

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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.