Home / 4,919.20-7,378.80-4,433.20

Finding the Fourth Proportional to 4,919.20, 7,378.80 and 4,433.20

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Solution

The fourth proportional to 4,919.20, 7,378.80 and 4,433.20 is: 6,649.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,919.20 : 7,378.80 = 4,433.20 : x
  2. Step 2: Convert to fraction form
    4,919.20/7,378.80 = 4,433.20/x
  3. Step 3: Cross multiply
    4,919.20x = 7,378.80 × 4,433.20
  4. Step 4: Simplify right side
    4,919.20x = 32,711,696.16
  5. Step 5: Solve for x
    x = 32,711,696.16/4,919.20
  6. Step 6: Final answer
    x = 6,649.80

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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.