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Finding the Fourth Proportional to 2,275.40, 3,411.30 and 1,249.40

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Solution

The fourth proportional to 2,275.40, 3,411.30 and 1,249.40 is: 1,873.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.40 : 3,411.30 = 1,249.40 : x
  2. Step 2: Convert to fraction form
    2,275.40/3,411.30 = 1,249.40/x
  3. Step 3: Cross multiply
    2,275.40x = 3,411.30 × 1,249.40
  4. Step 4: Simplify right side
    2,275.40x = 4,262,078.22
  5. Step 5: Solve for x
    x = 4,262,078.22/2,275.40
  6. Step 6: Final answer
    x = 1,873.11

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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.