Home / 2,275.39-3,140.12-1,280.98

Finding the Fourth Proportional to 2,275.39, 3,140.12 and 1,280.98

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Solution

The fourth proportional to 2,275.39, 3,140.12 and 1,280.98 is: 1,767.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.39 : 3,140.12 = 1,280.98 : x
  2. Step 2: Convert to fraction form
    2,275.39/3,140.12 = 1,280.98/x
  3. Step 3: Cross multiply
    2,275.39x = 3,140.12 × 1,280.98
  4. Step 4: Simplify right side
    2,275.39x = 4,022,408.81
  5. Step 5: Solve for x
    x = 4,022,408.81/2,275.39
  6. Step 6: Final answer
    x = 1,767.79

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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.