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Finding the Fourth Proportional to 3,512.74, 5,269.90 and 1,870.86

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Solution

The fourth proportional to 3,512.74, 5,269.90 and 1,870.86 is: 2,806.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,512.74 : 5,269.90 = 1,870.86 : x
  2. Step 2: Convert to fraction form
    3,512.74/5,269.90 = 1,870.86/x
  3. Step 3: Cross multiply
    3,512.74x = 5,269.90 × 1,870.86
  4. Step 4: Simplify right side
    3,512.74x = 9,859,245.11
  5. Step 5: Solve for x
    x = 9,859,245.11/3,512.74
  6. Step 6: Final answer
    x = 2,806.71

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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.