Home / 5,278.55-7,920.13-3,308.70

Finding the Fourth Proportional to 5,278.55, 7,920.13 and 3,308.70

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Solution

The fourth proportional to 5,278.55, 7,920.13 and 3,308.70 is: 4,964.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.55 : 7,920.13 = 3,308.70 : x
  2. Step 2: Convert to fraction form
    5,278.55/7,920.13 = 3,308.70/x
  3. Step 3: Cross multiply
    5,278.55x = 7,920.13 × 3,308.70
  4. Step 4: Simplify right side
    5,278.55x = 26,205,317.21
  5. Step 5: Solve for x
    x = 26,205,317.21/5,278.55
  6. Step 6: Final answer
    x = 4,964.49

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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.