Home / 3,141.28-4,335.12-1,815.40

Finding the Fourth Proportional to 3,141.28, 4,335.12 and 1,815.40

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Solution

The fourth proportional to 3,141.28, 4,335.12 and 1,815.40 is: 2,505.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,141.28 : 4,335.12 = 1,815.40 : x
  2. Step 2: Convert to fraction form
    3,141.28/4,335.12 = 1,815.40/x
  3. Step 3: Cross multiply
    3,141.28x = 4,335.12 × 1,815.40
  4. Step 4: Simplify right side
    3,141.28x = 7,869,976.85
  5. Step 5: Solve for x
    x = 7,869,976.85/3,141.28
  6. Step 6: Final answer
    x = 2,505.34

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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.