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Finding the Fourth Proportional to 273,478.60, 410,215.20 and 86,490.10

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Solution

The fourth proportional to 273,478.60, 410,215.20 and 86,490.10 is: 129,734.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,478.60 : 410,215.20 = 86,490.10 : x
  2. Step 2: Convert to fraction form
    273,478.60/410,215.20 = 86,490.10/x
  3. Step 3: Cross multiply
    273,478.60x = 410,215.20 × 86,490.10
  4. Step 4: Simplify right side
    273,478.60x = 35,479,553,669.52
  5. Step 5: Solve for x
    x = 35,479,553,669.52/273,478.60
  6. Step 6: Final answer
    x = 129,734.30

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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.