Home / 1,146.28-1,581.85-648.91

Finding the Fourth Proportional to 1,146.28, 1,581.85 and 648.91

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Solution

The fourth proportional to 1,146.28, 1,581.85 and 648.91 is: 895.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.28 : 1,581.85 = 648.91 : x
  2. Step 2: Convert to fraction form
    1,146.28/1,581.85 = 648.91/x
  3. Step 3: Cross multiply
    1,146.28x = 1,581.85 × 648.91
  4. Step 4: Simplify right side
    1,146.28x = 1,026,475.14
  5. Step 5: Solve for x
    x = 1,026,475.14/1,146.28
  6. Step 6: Final answer
    x = 895.49

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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.