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Finding the Fourth Proportional to 2,125.74, 3,187.98 and 738.71

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Solution

The fourth proportional to 2,125.74, 3,187.98 and 738.71 is: 1,107.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.74 : 3,187.98 = 738.71 : x
  2. Step 2: Convert to fraction form
    2,125.74/3,187.98 = 738.71/x
  3. Step 3: Cross multiply
    2,125.74x = 3,187.98 × 738.71
  4. Step 4: Simplify right side
    2,125.74x = 2,354,976.77
  5. Step 5: Solve for x
    x = 2,354,976.77/2,125.74
  6. Step 6: Final answer
    x = 1,107.84

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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.