Home / 5,278.59-7,912.40-2,780.91

Finding the Fourth Proportional to 5,278.59, 7,912.40 and 2,780.91

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Solution

The fourth proportional to 5,278.59, 7,912.40 and 2,780.91 is: 4,168.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.59 : 7,912.40 = 2,780.91 : x
  2. Step 2: Convert to fraction form
    5,278.59/7,912.40 = 2,780.91/x
  3. Step 3: Cross multiply
    5,278.59x = 7,912.40 × 2,780.91
  4. Step 4: Simplify right side
    5,278.59x = 22,003,658.38
  5. Step 5: Solve for x
    x = 22,003,658.38/5,278.59
  6. Step 6: Final answer
    x = 4,168.47

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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.