Home / 3,439.61-5,155.68-1,685.80

Finding the Fourth Proportional to 3,439.61, 5,155.68 and 1,685.80

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Solution

The fourth proportional to 3,439.61, 5,155.68 and 1,685.80 is: 2,526.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,439.61 : 5,155.68 = 1,685.80 : x
  2. Step 2: Convert to fraction form
    3,439.61/5,155.68 = 1,685.80/x
  3. Step 3: Cross multiply
    3,439.61x = 5,155.68 × 1,685.80
  4. Step 4: Simplify right side
    3,439.61x = 8,691,445.34
  5. Step 5: Solve for x
    x = 8,691,445.34/3,439.61
  6. Step 6: Final answer
    x = 2,526.87

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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.