Home / 2,818.40-4,227.60-870.80

Finding the Fourth Proportional to 2,818.40, 4,227.60 and 870.80

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Solution

The fourth proportional to 2,818.40, 4,227.60 and 870.80 is: 1,306.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.40 : 4,227.60 = 870.80 : x
  2. Step 2: Convert to fraction form
    2,818.40/4,227.60 = 870.80/x
  3. Step 3: Cross multiply
    2,818.40x = 4,227.60 × 870.80
  4. Step 4: Simplify right side
    2,818.40x = 3,681,394.08
  5. Step 5: Solve for x
    x = 3,681,394.08/2,818.40
  6. Step 6: Final answer
    x = 1,306.20

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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.