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Finding the Fourth Proportional to 2,812.80, 4,219.20 and 2,294.40

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Solution

The fourth proportional to 2,812.80, 4,219.20 and 2,294.40 is: 3,441.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.80 : 4,219.20 = 2,294.40 : x
  2. Step 2: Convert to fraction form
    2,812.80/4,219.20 = 2,294.40/x
  3. Step 3: Cross multiply
    2,812.80x = 4,219.20 × 2,294.40
  4. Step 4: Simplify right side
    2,812.80x = 9,680,532.48
  5. Step 5: Solve for x
    x = 9,680,532.48/2,812.80
  6. Step 6: Final answer
    x = 3,441.60

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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.