Home / 2,280.30-3,420.45-819.60

Finding the Fourth Proportional to 2,280.30, 3,420.45 and 819.60

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Solution

The fourth proportional to 2,280.30, 3,420.45 and 819.60 is: 1,229.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.30 : 3,420.45 = 819.60 : x
  2. Step 2: Convert to fraction form
    2,280.30/3,420.45 = 819.60/x
  3. Step 3: Cross multiply
    2,280.30x = 3,420.45 × 819.60
  4. Step 4: Simplify right side
    2,280.30x = 2,803,400.82
  5. Step 5: Solve for x
    x = 2,803,400.82/2,280.30
  6. Step 6: Final answer
    x = 1,229.40

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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.