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Finding the Fourth Proportional to 886.61, 1,329.14 and 574.39

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Solution

The fourth proportional to 886.61, 1,329.14 and 574.39 is: 861.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.61 : 1,329.14 = 574.39 : x
  2. Step 2: Convert to fraction form
    886.61/1,329.14 = 574.39/x
  3. Step 3: Cross multiply
    886.61x = 1,329.14 × 574.39
  4. Step 4: Simplify right side
    886.61x = 763,447.82
  5. Step 5: Solve for x
    x = 763,447.82/886.61
  6. Step 6: Final answer
    x = 861.08

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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.