Home / 1,248.20-1,868.46-1,171.40

Finding the Fourth Proportional to 1,248.20, 1,868.46 and 1,171.40

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Solution

The fourth proportional to 1,248.20, 1,868.46 and 1,171.40 is: 1,753.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.20 : 1,868.46 = 1,171.40 : x
  2. Step 2: Convert to fraction form
    1,248.20/1,868.46 = 1,171.40/x
  3. Step 3: Cross multiply
    1,248.20x = 1,868.46 × 1,171.40
  4. Step 4: Simplify right side
    1,248.20x = 2,188,714.04
  5. Step 5: Solve for x
    x = 2,188,714.04/1,248.20
  6. Step 6: Final answer
    x = 1,753.50

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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.