Home / 2,678.12-3,988.21-2,512.04

Finding the Fourth Proportional to 2,678.12, 3,988.21 and 2,512.04

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Solution

The fourth proportional to 2,678.12, 3,988.21 and 2,512.04 is: 3,740.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,678.12 : 3,988.21 = 2,512.04 : x
  2. Step 2: Convert to fraction form
    2,678.12/3,988.21 = 2,512.04/x
  3. Step 3: Cross multiply
    2,678.12x = 3,988.21 × 2,512.04
  4. Step 4: Simplify right side
    2,678.12x = 10,018,543.05
  5. Step 5: Solve for x
    x = 10,018,543.05/2,678.12
  6. Step 6: Final answer
    x = 3,740.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.