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Finding the Fourth Proportional to 3,421.70, 5,132.55 and 3,151.70

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Solution

The fourth proportional to 3,421.70, 5,132.55 and 3,151.70 is: 4,727.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.70 : 5,132.55 = 3,151.70 : x
  2. Step 2: Convert to fraction form
    3,421.70/5,132.55 = 3,151.70/x
  3. Step 3: Cross multiply
    3,421.70x = 5,132.55 × 3,151.70
  4. Step 4: Simplify right side
    3,421.70x = 16,176,257.84
  5. Step 5: Solve for x
    x = 16,176,257.84/3,421.70
  6. Step 6: Final answer
    x = 4,727.55

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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.