Home / 5,278.71-7,284.60-2,920.80

Finding the Fourth Proportional to 5,278.71, 7,284.60 and 2,920.80

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Solution

The fourth proportional to 5,278.71, 7,284.60 and 2,920.80 is: 4,030.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.71 : 7,284.60 = 2,920.80 : x
  2. Step 2: Convert to fraction form
    5,278.71/7,284.60 = 2,920.80/x
  3. Step 3: Cross multiply
    5,278.71x = 7,284.60 × 2,920.80
  4. Step 4: Simplify right side
    5,278.71x = 21,276,859.68
  5. Step 5: Solve for x
    x = 21,276,859.68/5,278.71
  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.