Home / 3,870.40-5,343.98-2,380.36

Finding the Fourth Proportional to 3,870.40, 5,343.98 and 2,380.36

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Solution

The fourth proportional to 3,870.40, 5,343.98 and 2,380.36 is: 3,286.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.40 : 5,343.98 = 2,380.36 : x
  2. Step 2: Convert to fraction form
    3,870.40/5,343.98 = 2,380.36/x
  3. Step 3: Cross multiply
    3,870.40x = 5,343.98 × 2,380.36
  4. Step 4: Simplify right side
    3,870.40x = 12,720,596.23
  5. Step 5: Solve for x
    x = 12,720,596.23/3,870.40
  6. Step 6: Final answer
    x = 3,286.64

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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.