Home / 1,440.11-1,986.12-1,160.25

Finding the Fourth Proportional to 1,440.11, 1,986.12 and 1,160.25

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Solution

The fourth proportional to 1,440.11, 1,986.12 and 1,160.25 is: 1,600.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,440.11 : 1,986.12 = 1,160.25 : x
  2. Step 2: Convert to fraction form
    1,440.11/1,986.12 = 1,160.25/x
  3. Step 3: Cross multiply
    1,440.11x = 1,986.12 × 1,160.25
  4. Step 4: Simplify right side
    1,440.11x = 2,304,395.73
  5. Step 5: Solve for x
    x = 2,304,395.73/1,440.11
  6. Step 6: Final answer
    x = 1,600.16

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