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Finding the Fourth Proportional to 1,124.12, 1,686.90 and 475.22

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Solution

The fourth proportional to 1,124.12, 1,686.90 and 475.22 is: 713.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.12 : 1,686.90 = 475.22 : x
  2. Step 2: Convert to fraction form
    1,124.12/1,686.90 = 475.22/x
  3. Step 3: Cross multiply
    1,124.12x = 1,686.90 × 475.22
  4. Step 4: Simplify right side
    1,124.12x = 801,648.62
  5. Step 5: Solve for x
    x = 801,648.62/1,124.12
  6. Step 6: Final answer
    x = 713.13

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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.