Home / 1,146.09-1,581.66-648.75

Finding the Fourth Proportional to 1,146.09, 1,581.66 and 648.75

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Solution

The fourth proportional to 1,146.09, 1,581.66 and 648.75 is: 895.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.09 : 1,581.66 = 648.75 : x
  2. Step 2: Convert to fraction form
    1,146.09/1,581.66 = 648.75/x
  3. Step 3: Cross multiply
    1,146.09x = 1,581.66 × 648.75
  4. Step 4: Simplify right side
    1,146.09x = 1,026,101.93
  5. Step 5: Solve for x
    x = 1,026,101.93/1,146.09
  6. Step 6: Final answer
    x = 895.31

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Half scale
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Double scale
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1.5x scale

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.