Home / 5,278.70-7,284.60-2,920.79

Finding the Fourth Proportional to 5,278.70, 7,284.60 and 2,920.79

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Solution

The fourth proportional to 5,278.70, 7,284.60 and 2,920.79 is: 4,030.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.70 : 7,284.60 = 2,920.79 : x
  2. Step 2: Convert to fraction form
    5,278.70/7,284.60 = 2,920.79/x
  3. Step 3: Cross multiply
    5,278.70x = 7,284.60 × 2,920.79
  4. Step 4: Simplify right side
    5,278.70x = 21,276,805.05
  5. Step 5: Solve for x
    x = 21,276,805.05/5,278.70
  6. Step 6: Final answer
    x = 4,030.69

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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.