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Finding the Fourth Proportional to 1,612.16, 2,418.80 and 843.20

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Solution

The fourth proportional to 1,612.16, 2,418.80 and 843.20 is: 1,265.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,612.16 : 2,418.80 = 843.20 : x
  2. Step 2: Convert to fraction form
    1,612.16/2,418.80 = 843.20/x
  3. Step 3: Cross multiply
    1,612.16x = 2,418.80 × 843.20
  4. Step 4: Simplify right side
    1,612.16x = 2,039,532.16
  5. Step 5: Solve for x
    x = 2,039,532.16/1,612.16
  6. Step 6: Final answer
    x = 1,265.09

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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.