Home / 3,439.60-5,158.80-1,247.20

Finding the Fourth Proportional to 3,439.60, 5,158.80 and 1,247.20

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Solution

The fourth proportional to 3,439.60, 5,158.80 and 1,247.20 is: 1,870.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,439.60 : 5,158.80 = 1,247.20 : x
  2. Step 2: Convert to fraction form
    3,439.60/5,158.80 = 1,247.20/x
  3. Step 3: Cross multiply
    3,439.60x = 5,158.80 × 1,247.20
  4. Step 4: Simplify right side
    3,439.60x = 6,434,055.36
  5. Step 5: Solve for x
    x = 6,434,055.36/3,439.60
  6. Step 6: Final answer
    x = 1,870.58

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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.