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Finding the Fourth Proportional to 837.27, 1,155.25 and 663.12

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Solution

The fourth proportional to 837.27, 1,155.25 and 663.12 is: 914.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.27 : 1,155.25 = 663.12 : x
  2. Step 2: Convert to fraction form
    837.27/1,155.25 = 663.12/x
  3. Step 3: Cross multiply
    837.27x = 1,155.25 × 663.12
  4. Step 4: Simplify right side
    837.27x = 766,069.38
  5. Step 5: Solve for x
    x = 766,069.38/837.27
  6. Step 6: Final answer
    x = 914.96

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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.