Home / 2,748.40-4,122.60-1,287.70

Finding the Fourth Proportional to 2,748.40, 4,122.60 and 1,287.70

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Solution

The fourth proportional to 2,748.40, 4,122.60 and 1,287.70 is: 1,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,748.40 : 4,122.60 = 1,287.70 : x
  2. Step 2: Convert to fraction form
    2,748.40/4,122.60 = 1,287.70/x
  3. Step 3: Cross multiply
    2,748.40x = 4,122.60 × 1,287.70
  4. Step 4: Simplify right side
    2,748.40x = 5,308,672.02
  5. Step 5: Solve for x
    x = 5,308,672.02/2,748.40
  6. Step 6: Final answer
    x = 1,931.55

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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.