Home / 2,275.15-3,138.88-1,330.60

Finding the Fourth Proportional to 2,275.15, 3,138.88 and 1,330.60

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Solution

The fourth proportional to 2,275.15, 3,138.88 and 1,330.60 is: 1,835.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.15 : 3,138.88 = 1,330.60 : x
  2. Step 2: Convert to fraction form
    2,275.15/3,138.88 = 1,330.60/x
  3. Step 3: Cross multiply
    2,275.15x = 3,138.88 × 1,330.60
  4. Step 4: Simplify right side
    2,275.15x = 4,176,593.73
  5. Step 5: Solve for x
    x = 4,176,593.73/2,275.15
  6. Step 6: Final answer
    x = 1,835.74

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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.