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Finding the Fourth Proportional to 273,428.70, 410,143.05 and 86,440.20

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Solution

The fourth proportional to 273,428.70, 410,143.05 and 86,440.20 is: 129,660.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,428.70 : 410,143.05 = 86,440.20 : x
  2. Step 2: Convert to fraction form
    273,428.70/410,143.05 = 86,440.20/x
  3. Step 3: Cross multiply
    273,428.70x = 410,143.05 × 86,440.20
  4. Step 4: Simplify right side
    273,428.70x = 35,452,847,270.61
  5. Step 5: Solve for x
    x = 35,452,847,270.61/273,428.70
  6. Step 6: Final answer
    x = 129,660.30

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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.