Home / 3,280.65-4,530.48-2,805.78

Finding the Fourth Proportional to 3,280.65, 4,530.48 and 2,805.78

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Solution

The fourth proportional to 3,280.65, 4,530.48 and 2,805.78 is: 3,874.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.65 : 4,530.48 = 2,805.78 : x
  2. Step 2: Convert to fraction form
    3,280.65/4,530.48 = 2,805.78/x
  3. Step 3: Cross multiply
    3,280.65x = 4,530.48 × 2,805.78
  4. Step 4: Simplify right side
    3,280.65x = 12,711,530.17
  5. Step 5: Solve for x
    x = 12,711,530.17/3,280.65
  6. Step 6: Final answer
    x = 3,874.70

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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.