Home / 1,146.11-1,581.64-648.80

Finding the Fourth Proportional to 1,146.11, 1,581.64 and 648.80

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Solution

The fourth proportional to 1,146.11, 1,581.64 and 648.80 is: 895.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.11 : 1,581.64 = 648.80 : x
  2. Step 2: Convert to fraction form
    1,146.11/1,581.64 = 648.80/x
  3. Step 3: Cross multiply
    1,146.11x = 1,581.64 × 648.80
  4. Step 4: Simplify right side
    1,146.11x = 1,026,168.03
  5. Step 5: Solve for x
    x = 1,026,168.03/1,146.11
  6. Step 6: Final answer
    x = 895.35

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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.