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Finding the Fourth Proportional to 841.73, 1,161.57 and 487.65

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Solution

The fourth proportional to 841.73, 1,161.57 and 487.65 is: 672.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.73 : 1,161.57 = 487.65 : x
  2. Step 2: Convert to fraction form
    841.73/1,161.57 = 487.65/x
  3. Step 3: Cross multiply
    841.73x = 1,161.57 × 487.65
  4. Step 4: Simplify right side
    841.73x = 566,439.61
  5. Step 5: Solve for x
    x = 566,439.61/841.73
  6. Step 6: Final answer
    x = 672.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.