Home / 1,440.28-2,160.42-709.12

Finding the Fourth Proportional to 1,440.28, 2,160.42 and 709.12

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Solution

The fourth proportional to 1,440.28, 2,160.42 and 709.12 is: 1,063.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.28 : 2,160.42 = 709.12 : x
  2. Step 2: Convert to fraction form
    1,440.28/2,160.42 = 709.12/x
  3. Step 3: Cross multiply
    1,440.28x = 2,160.42 × 709.12
  4. Step 4: Simplify right side
    1,440.28x = 1,531,997.03
  5. Step 5: Solve for x
    x = 1,531,997.03/1,440.28
  6. Step 6: Final answer
    x = 1,063.68

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.