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Finding the Fourth Proportional to 2,974.80, 4,105.42 and 1,648.74

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Solution

The fourth proportional to 2,974.80, 4,105.42 and 1,648.74 is: 2,275.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,974.80 : 4,105.42 = 1,648.74 : x
  2. Step 2: Convert to fraction form
    2,974.80/4,105.42 = 1,648.74/x
  3. Step 3: Cross multiply
    2,974.80x = 4,105.42 × 1,648.74
  4. Step 4: Simplify right side
    2,974.80x = 6,768,770.17
  5. Step 5: Solve for x
    x = 6,768,770.17/2,974.80
  6. Step 6: Final answer
    x = 2,275.37

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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.