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Finding the Fourth Proportional to 483,213.40, 724,820.10 and 128,282.20

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Solution

The fourth proportional to 483,213.40, 724,820.10 and 128,282.20 is: 192,423.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,213.40 : 724,820.10 = 128,282.20 : x
  2. Step 2: Convert to fraction form
    483,213.40/724,820.10 = 128,282.20/x
  3. Step 3: Cross multiply
    483,213.40x = 724,820.10 × 128,282.20
  4. Step 4: Simplify right side
    483,213.40x = 92,981,517,032.22
  5. Step 5: Solve for x
    x = 92,981,517,032.22/483,213.40
  6. Step 6: Final answer
    x = 192,423.30

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Similar ratio
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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.