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Finding the Fourth Proportional to 885.92, 1,222.57 and 487.59

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Solution

The fourth proportional to 885.92, 1,222.57 and 487.59 is: 672.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.92 : 1,222.57 = 487.59 : x
  2. Step 2: Convert to fraction form
    885.92/1,222.57 = 487.59/x
  3. Step 3: Cross multiply
    885.92x = 1,222.57 × 487.59
  4. Step 4: Simplify right side
    885.92x = 596,114.13
  5. Step 5: Solve for x
    x = 596,114.13/885.92
  6. Step 6: Final answer
    x = 672.88

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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.