Home / 3,852.90-5,780.10-1,387.92

Finding the Fourth Proportional to 3,852.90, 5,780.10 and 1,387.92

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Solution

The fourth proportional to 3,852.90, 5,780.10 and 1,387.92 is: 2,082.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,852.90 : 5,780.10 = 1,387.92 : x
  2. Step 2: Convert to fraction form
    3,852.90/5,780.10 = 1,387.92/x
  3. Step 3: Cross multiply
    3,852.90x = 5,780.10 × 1,387.92
  4. Step 4: Simplify right side
    3,852.90x = 8,022,316.39
  5. Step 5: Solve for x
    x = 8,022,316.39/3,852.90
  6. Step 6: Final answer
    x = 2,082.15

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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.