Home / 2,988.80-4,482.72-1,257.12

Finding the Fourth Proportional to 2,988.80, 4,482.72 and 1,257.12

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Solution

The fourth proportional to 2,988.80, 4,482.72 and 1,257.12 is: 1,885.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.80 : 4,482.72 = 1,257.12 : x
  2. Step 2: Convert to fraction form
    2,988.80/4,482.72 = 1,257.12/x
  3. Step 3: Cross multiply
    2,988.80x = 4,482.72 × 1,257.12
  4. Step 4: Simplify right side
    2,988.80x = 5,635,316.97
  5. Step 5: Solve for x
    x = 5,635,316.97/2,988.80
  6. Step 6: Final answer
    x = 1,885.48

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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.