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Finding the Fourth Proportional to 757.47, 1,133.61 and 479.70

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Solution

The fourth proportional to 757.47, 1,133.61 and 479.70 is: 717.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.47 : 1,133.61 = 479.70 : x
  2. Step 2: Convert to fraction form
    757.47/1,133.61 = 479.70/x
  3. Step 3: Cross multiply
    757.47x = 1,133.61 × 479.70
  4. Step 4: Simplify right side
    757.47x = 543,792.72
  5. Step 5: Solve for x
    x = 543,792.72/757.47
  6. Step 6: Final answer
    x = 717.91

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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.