Home / 3,852.60-5,778.90-1,387.80

Finding the Fourth Proportional to 3,852.60, 5,778.90 and 1,387.80

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Solution

The fourth proportional to 3,852.60, 5,778.90 and 1,387.80 is: 2,081.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,852.60 : 5,778.90 = 1,387.80 : x
  2. Step 2: Convert to fraction form
    3,852.60/5,778.90 = 1,387.80/x
  3. Step 3: Cross multiply
    3,852.60x = 5,778.90 × 1,387.80
  4. Step 4: Simplify right side
    3,852.60x = 8,019,957.42
  5. Step 5: Solve for x
    x = 8,019,957.42/3,852.60
  6. Step 6: Final answer
    x = 2,081.70

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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.