Home / 2,988.80-4,128.48-2,288.96

Finding the Fourth Proportional to 2,988.80, 4,128.48 and 2,288.96

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Solution

The fourth proportional to 2,988.80, 4,128.48 and 2,288.96 is: 3,161.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.80 : 4,128.48 = 2,288.96 : x
  2. Step 2: Convert to fraction form
    2,988.80/4,128.48 = 2,288.96/x
  3. Step 3: Cross multiply
    2,988.80x = 4,128.48 × 2,288.96
  4. Step 4: Simplify right side
    2,988.80x = 9,449,925.58
  5. Step 5: Solve for x
    x = 9,449,925.58/2,988.80
  6. Step 6: Final answer
    x = 3,161.78

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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.