Home / 3,870.85-5,341.79-2,378.77

Finding the Fourth Proportional to 3,870.85, 5,341.79 and 2,378.77

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Solution

The fourth proportional to 3,870.85, 5,341.79 and 2,378.77 is: 3,282.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.85 : 5,341.79 = 2,378.77 : x
  2. Step 2: Convert to fraction form
    3,870.85/5,341.79 = 2,378.77/x
  3. Step 3: Cross multiply
    3,870.85x = 5,341.79 × 2,378.77
  4. Step 4: Simplify right side
    3,870.85x = 12,706,889.80
  5. Step 5: Solve for x
    x = 12,706,889.80/3,870.85
  6. Step 6: Final answer
    x = 3,282.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.