Home / 2,988.78-4,124.98-1,729.86

Finding the Fourth Proportional to 2,988.78, 4,124.98 and 1,729.86

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Solution

The fourth proportional to 2,988.78, 4,124.98 and 1,729.86 is: 2,387.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.78 : 4,124.98 = 1,729.86 : x
  2. Step 2: Convert to fraction form
    2,988.78/4,124.98 = 1,729.86/x
  3. Step 3: Cross multiply
    2,988.78x = 4,124.98 × 1,729.86
  4. Step 4: Simplify right side
    2,988.78x = 7,135,637.90
  5. Step 5: Solve for x
    x = 7,135,637.90/2,988.78
  6. Step 6: Final answer
    x = 2,387.48

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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.