Home / 4,865.60-7,288.80-2,811.20

Finding the Fourth Proportional to 4,865.60, 7,288.80 and 2,811.20

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Solution

The fourth proportional to 4,865.60, 7,288.80 and 2,811.20 is: 4,211.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,865.60 : 7,288.80 = 2,811.20 : x
  2. Step 2: Convert to fraction form
    4,865.60/7,288.80 = 2,811.20/x
  3. Step 3: Cross multiply
    4,865.60x = 7,288.80 × 2,811.20
  4. Step 4: Simplify right side
    4,865.60x = 20,490,274.56
  5. Step 5: Solve for x
    x = 20,490,274.56/4,865.60
  6. Step 6: Final answer
    x = 4,211.25

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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.