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Finding the Fourth Proportional to 886.23, 1,223.02 and 487.91

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Solution

The fourth proportional to 886.23, 1,223.02 and 487.91 is: 673.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.23 : 1,223.02 = 487.91 : x
  2. Step 2: Convert to fraction form
    886.23/1,223.02 = 487.91/x
  3. Step 3: Cross multiply
    886.23x = 1,223.02 × 487.91
  4. Step 4: Simplify right side
    886.23x = 596,717.73
  5. Step 5: Solve for x
    x = 596,717.73/886.23
  6. Step 6: Final answer
    x = 673.32

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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.