Home / 2,315.68-3,194.70-1,320.76

Finding the Fourth Proportional to 2,315.68, 3,194.70 and 1,320.76

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Solution

The fourth proportional to 2,315.68, 3,194.70 and 1,320.76 is: 1,822.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.68 : 3,194.70 = 1,320.76 : x
  2. Step 2: Convert to fraction form
    2,315.68/3,194.70 = 1,320.76/x
  3. Step 3: Cross multiply
    2,315.68x = 3,194.70 × 1,320.76
  4. Step 4: Simplify right side
    2,315.68x = 4,219,431.97
  5. Step 5: Solve for x
    x = 4,219,431.97/2,315.68
  6. Step 6: Final answer
    x = 1,822.11

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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.