Home / 2,988.15-4,122.97-1,729.17

Finding the Fourth Proportional to 2,988.15, 4,122.97 and 1,729.17

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Solution

The fourth proportional to 2,988.15, 4,122.97 and 1,729.17 is: 2,385.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.15 : 4,122.97 = 1,729.17 : x
  2. Step 2: Convert to fraction form
    2,988.15/4,122.97 = 1,729.17/x
  3. Step 3: Cross multiply
    2,988.15x = 4,122.97 × 1,729.17
  4. Step 4: Simplify right side
    2,988.15x = 7,129,307.39
  5. Step 5: Solve for x
    x = 7,129,307.39/2,988.15
  6. Step 6: Final answer
    x = 2,385.86

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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.