Home / 1,425.75-2,149.64-1,140.63

Finding the Fourth Proportional to 1,425.75, 2,149.64 and 1,140.63

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Solution

The fourth proportional to 1,425.75, 2,149.64 and 1,140.63 is: 1,719.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425.75 : 2,149.64 = 1,140.63 : x
  2. Step 2: Convert to fraction form
    1,425.75/2,149.64 = 1,140.63/x
  3. Step 3: Cross multiply
    1,425.75x = 2,149.64 × 1,140.63
  4. Step 4: Simplify right side
    1,425.75x = 2,451,938.17
  5. Step 5: Solve for x
    x = 2,451,938.17/1,425.75
  6. Step 6: Final answer
    x = 1,719.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.