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Finding the Fourth Proportional to 1,131.05, 1,695.99 and 472.75

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Solution

The fourth proportional to 1,131.05, 1,695.99 and 472.75 is: 708.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.05 : 1,695.99 = 472.75 : x
  2. Step 2: Convert to fraction form
    1,131.05/1,695.99 = 472.75/x
  3. Step 3: Cross multiply
    1,131.05x = 1,695.99 × 472.75
  4. Step 4: Simplify right side
    1,131.05x = 801,773.92
  5. Step 5: Solve for x
    x = 801,773.92/1,131.05
  6. Step 6: Final answer
    x = 708.88

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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.