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Finding the Fourth Proportional to 3,129.70, 4,694.55 and 3,100.90

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Solution

The fourth proportional to 3,129.70, 4,694.55 and 3,100.90 is: 4,651.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.70 : 4,694.55 = 3,100.90 : x
  2. Step 2: Convert to fraction form
    3,129.70/4,694.55 = 3,100.90/x
  3. Step 3: Cross multiply
    3,129.70x = 4,694.55 × 3,100.90
  4. Step 4: Simplify right side
    3,129.70x = 14,557,330.10
  5. Step 5: Solve for x
    x = 14,557,330.10/3,129.70
  6. Step 6: Final answer
    x = 4,651.35

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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.