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Finding the Fourth Proportional to 886.14, 1,222.89 and 487.80

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Solution

The fourth proportional to 886.14, 1,222.89 and 487.80 is: 673.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.14 : 1,222.89 = 487.80 : x
  2. Step 2: Convert to fraction form
    886.14/1,222.89 = 487.80/x
  3. Step 3: Cross multiply
    886.14x = 1,222.89 × 487.80
  4. Step 4: Simplify right side
    886.14x = 596,525.74
  5. Step 5: Solve for x
    x = 596,525.74/886.14
  6. Step 6: Final answer
    x = 673.17

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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.