Home / 1,442.28-2,163.57-711.15

Finding the Fourth Proportional to 1,442.28, 2,163.57 and 711.15

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Solution

The fourth proportional to 1,442.28, 2,163.57 and 711.15 is: 1,066.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.28 : 2,163.57 = 711.15 : x
  2. Step 2: Convert to fraction form
    1,442.28/2,163.57 = 711.15/x
  3. Step 3: Cross multiply
    1,442.28x = 2,163.57 × 711.15
  4. Step 4: Simplify right side
    1,442.28x = 1,538,620.14
  5. Step 5: Solve for x
    x = 1,538,620.14/1,442.28
  6. Step 6: Final answer
    x = 1,066.80

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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.