Home / 5,278.78-7,279.48-3,390.06

Finding the Fourth Proportional to 5,278.78, 7,279.48 and 3,390.06

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Solution

The fourth proportional to 5,278.78, 7,279.48 and 3,390.06 is: 4,674.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.78 : 7,279.48 = 3,390.06 : x
  2. Step 2: Convert to fraction form
    5,278.78/7,279.48 = 3,390.06/x
  3. Step 3: Cross multiply
    5,278.78x = 7,279.48 × 3,390.06
  4. Step 4: Simplify right side
    5,278.78x = 24,677,873.97
  5. Step 5: Solve for x
    x = 24,677,873.97/5,278.78
  6. Step 6: Final answer
    x = 4,674.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.