Home / 3,387.15-5,080.19-1,306.40

Finding the Fourth Proportional to 3,387.15, 5,080.19 and 1,306.40

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Solution

The fourth proportional to 3,387.15, 5,080.19 and 1,306.40 is: 1,959.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.15 : 5,080.19 = 1,306.40 : x
  2. Step 2: Convert to fraction form
    3,387.15/5,080.19 = 1,306.40/x
  3. Step 3: Cross multiply
    3,387.15x = 5,080.19 × 1,306.40
  4. Step 4: Simplify right side
    3,387.15x = 6,636,728.28
  5. Step 5: Solve for x
    x = 6,636,728.28/3,387.15
  6. Step 6: Final answer
    x = 1,959.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.