Home / 2,275.06-3,139.80-1,330.80

Finding the Fourth Proportional to 2,275.06, 3,139.80 and 1,330.80

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Solution

The fourth proportional to 2,275.06, 3,139.80 and 1,330.80 is: 1,836.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.06 : 3,139.80 = 1,330.80 : x
  2. Step 2: Convert to fraction form
    2,275.06/3,139.80 = 1,330.80/x
  3. Step 3: Cross multiply
    2,275.06x = 3,139.80 × 1,330.80
  4. Step 4: Simplify right side
    2,275.06x = 4,178,445.84
  5. Step 5: Solve for x
    x = 4,178,445.84/2,275.06
  6. Step 6: Final answer
    x = 1,836.63

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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.