Home / 1,475.28-2,035.85-812.13

Finding the Fourth Proportional to 1,475.28, 2,035.85 and 812.13

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Solution

The fourth proportional to 1,475.28, 2,035.85 and 812.13 is: 1,120.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,475.28 : 2,035.85 = 812.13 : x
  2. Step 2: Convert to fraction form
    1,475.28/2,035.85 = 812.13/x
  3. Step 3: Cross multiply
    1,475.28x = 2,035.85 × 812.13
  4. Step 4: Simplify right side
    1,475.28x = 1,653,367.73
  5. Step 5: Solve for x
    x = 1,653,367.73/1,475.28
  6. Step 6: Final answer
    x = 1,120.71

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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.