Home / 3,660.57-5,487.98-1,320.21

Finding the Fourth Proportional to 3,660.57, 5,487.98 and 1,320.21

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Solution

The fourth proportional to 3,660.57, 5,487.98 and 1,320.21 is: 1,979.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,660.57 : 5,487.98 = 1,320.21 : x
  2. Step 2: Convert to fraction form
    3,660.57/5,487.98 = 1,320.21/x
  3. Step 3: Cross multiply
    3,660.57x = 5,487.98 × 1,320.21
  4. Step 4: Simplify right side
    3,660.57x = 7,245,279.47
  5. Step 5: Solve for x
    x = 7,245,279.47/3,660.57
  6. Step 6: Final answer
    x = 1,979.28

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.