Home / 1,115.92-1,528.80-1,074.38

Finding the Fourth Proportional to 1,115.92, 1,528.80 and 1,074.38

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Solution

The fourth proportional to 1,115.92, 1,528.80 and 1,074.38 is: 1,471.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.92 : 1,528.80 = 1,074.38 : x
  2. Step 2: Convert to fraction form
    1,115.92/1,528.80 = 1,074.38/x
  3. Step 3: Cross multiply
    1,115.92x = 1,528.80 × 1,074.38
  4. Step 4: Simplify right side
    1,115.92x = 1,642,512.14
  5. Step 5: Solve for x
    x = 1,642,512.14/1,115.92
  6. Step 6: Final answer
    x = 1,471.89

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.