Home / 3,853.50-5,780.55-1,388.57

Finding the Fourth Proportional to 3,853.50, 5,780.55 and 1,388.57

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Solution

The fourth proportional to 3,853.50, 5,780.55 and 1,388.57 is: 2,082.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,853.50 : 5,780.55 = 1,388.57 : x
  2. Step 2: Convert to fraction form
    3,853.50/5,780.55 = 1,388.57/x
  3. Step 3: Cross multiply
    3,853.50x = 5,780.55 × 1,388.57
  4. Step 4: Simplify right side
    3,853.50x = 8,026,669.41
  5. Step 5: Solve for x
    x = 8,026,669.41/3,853.50
  6. Step 6: Final answer
    x = 2,082.96

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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.