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Finding the Fourth Proportional to 886.49, 1,331.09 and 476.43

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Solution

The fourth proportional to 886.49, 1,331.09 and 476.43 is: 715.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.49 : 1,331.09 = 476.43 : x
  2. Step 2: Convert to fraction form
    886.49/1,331.09 = 476.43/x
  3. Step 3: Cross multiply
    886.49x = 1,331.09 × 476.43
  4. Step 4: Simplify right side
    886.49x = 634,164.55
  5. Step 5: Solve for x
    x = 634,164.55/886.49
  6. Step 6: Final answer
    x = 715.37

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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.