Home / 1,921.38-2,649.08-1,257.18

Finding the Fourth Proportional to 1,921.38, 2,649.08 and 1,257.18

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Solution

The fourth proportional to 1,921.38, 2,649.08 and 1,257.18 is: 1,733.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.38 : 2,649.08 = 1,257.18 : x
  2. Step 2: Convert to fraction form
    1,921.38/2,649.08 = 1,257.18/x
  3. Step 3: Cross multiply
    1,921.38x = 2,649.08 × 1,257.18
  4. Step 4: Simplify right side
    1,921.38x = 3,330,364.11
  5. Step 5: Solve for x
    x = 3,330,364.11/1,921.38
  6. Step 6: Final answer
    x = 1,733.32

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Half scale
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Double scale
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Similar ratio
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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.