Home / 1,964.50-2,712.34-1,218.76

Finding the Fourth Proportional to 1,964.50, 2,712.34 and 1,218.76

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Solution

The fourth proportional to 1,964.50, 2,712.34 and 1,218.76 is: 1,682.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,964.50 : 2,712.34 = 1,218.76 : x
  2. Step 2: Convert to fraction form
    1,964.50/2,712.34 = 1,218.76/x
  3. Step 3: Cross multiply
    1,964.50x = 2,712.34 × 1,218.76
  4. Step 4: Simplify right side
    1,964.50x = 3,305,691.50
  5. Step 5: Solve for x
    x = 3,305,691.50/1,964.50
  6. Step 6: Final answer
    x = 1,682.71

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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.