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Finding the Fourth Proportional to 3,126.80, 4,689.08 and 934.80

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Solution

The fourth proportional to 3,126.80, 4,689.08 and 934.80 is: 1,401.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.80 : 4,689.08 = 934.80 : x
  2. Step 2: Convert to fraction form
    3,126.80/4,689.08 = 934.80/x
  3. Step 3: Cross multiply
    3,126.80x = 4,689.08 × 934.80
  4. Step 4: Simplify right side
    3,126.80x = 4,383,351.98
  5. Step 5: Solve for x
    x = 4,383,351.98/3,126.80
  6. Step 6: Final answer
    x = 1,401.87

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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.