Home / 5,278.39-7,920.30-2,358.61

Finding the Fourth Proportional to 5,278.39, 7,920.30 and 2,358.61

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Solution

The fourth proportional to 5,278.39, 7,920.30 and 2,358.61 is: 3,539.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.39 : 7,920.30 = 2,358.61 : x
  2. Step 2: Convert to fraction form
    5,278.39/7,920.30 = 2,358.61/x
  3. Step 3: Cross multiply
    5,278.39x = 7,920.30 × 2,358.61
  4. Step 4: Simplify right side
    5,278.39x = 18,680,886.99
  5. Step 5: Solve for x
    x = 18,680,886.99/5,278.39
  6. Step 6: Final answer
    x = 3,539.13

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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.