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Finding the Fourth Proportional to 3,425.68, 5,137.84 and 1,645.71

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Solution

The fourth proportional to 3,425.68, 5,137.84 and 1,645.71 is: 2,468.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,425.68 : 5,137.84 = 1,645.71 : x
  2. Step 2: Convert to fraction form
    3,425.68/5,137.84 = 1,645.71/x
  3. Step 3: Cross multiply
    3,425.68x = 5,137.84 × 1,645.71
  4. Step 4: Simplify right side
    3,425.68x = 8,455,394.67
  5. Step 5: Solve for x
    x = 8,455,394.67/3,425.68
  6. Step 6: Final answer
    x = 2,468.24

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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.