Home / 1,613.72-2,228.19-1,240.11

Finding the Fourth Proportional to 1,613.72, 2,228.19 and 1,240.11

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Solution

The fourth proportional to 1,613.72, 2,228.19 and 1,240.11 is: 1,712.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,613.72 : 2,228.19 = 1,240.11 : x
  2. Step 2: Convert to fraction form
    1,613.72/2,228.19 = 1,240.11/x
  3. Step 3: Cross multiply
    1,613.72x = 2,228.19 × 1,240.11
  4. Step 4: Simplify right side
    1,613.72x = 2,763,200.70
  5. Step 5: Solve for x
    x = 2,763,200.70/1,613.72
  6. Step 6: Final answer
    x = 1,712.32

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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.