Home / 1,691.27-2,535.16-812.45

Finding the Fourth Proportional to 1,691.27, 2,535.16 and 812.45

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Solution

The fourth proportional to 1,691.27, 2,535.16 and 812.45 is: 1,217.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.27 : 2,535.16 = 812.45 : x
  2. Step 2: Convert to fraction form
    1,691.27/2,535.16 = 812.45/x
  3. Step 3: Cross multiply
    1,691.27x = 2,535.16 × 812.45
  4. Step 4: Simplify right side
    1,691.27x = 2,059,691.76
  5. Step 5: Solve for x
    x = 2,059,691.76/1,691.27
  6. Step 6: Final answer
    x = 1,217.84

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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.