Home / 2,275.37-3,139.84-1,280.45

Finding the Fourth Proportional to 2,275.37, 3,139.84 and 1,280.45

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Solution

The fourth proportional to 2,275.37, 3,139.84 and 1,280.45 is: 1,766.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.37 : 3,139.84 = 1,280.45 : x
  2. Step 2: Convert to fraction form
    2,275.37/3,139.84 = 1,280.45/x
  3. Step 3: Cross multiply
    2,275.37x = 3,139.84 × 1,280.45
  4. Step 4: Simplify right side
    2,275.37x = 4,020,408.13
  5. Step 5: Solve for x
    x = 4,020,408.13/2,275.37
  6. Step 6: Final answer
    x = 1,766.92

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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.