Home / 1,148.25-1,585.14-1,107.21

Finding the Fourth Proportional to 1,148.25, 1,585.14 and 1,107.21

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Solution

The fourth proportional to 1,148.25, 1,585.14 and 1,107.21 is: 1,528.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.25 : 1,585.14 = 1,107.21 : x
  2. Step 2: Convert to fraction form
    1,148.25/1,585.14 = 1,107.21/x
  3. Step 3: Cross multiply
    1,148.25x = 1,585.14 × 1,107.21
  4. Step 4: Simplify right side
    1,148.25x = 1,755,082.86
  5. Step 5: Solve for x
    x = 1,755,082.86/1,148.25
  6. Step 6: Final answer
    x = 1,528.48

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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.