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Finding the Fourth Proportional to 891.46, 1,337.70 and 480.59

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Solution

The fourth proportional to 891.46, 1,337.70 and 480.59 is: 721.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.46 : 1,337.70 = 480.59 : x
  2. Step 2: Convert to fraction form
    891.46/1,337.70 = 480.59/x
  3. Step 3: Cross multiply
    891.46x = 1,337.70 × 480.59
  4. Step 4: Simplify right side
    891.46x = 642,885.24
  5. Step 5: Solve for x
    x = 642,885.24/891.46
  6. Step 6: Final answer
    x = 721.16

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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.