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Finding the Fourth Proportional to 288,687.60, 398,380.61 and 159,623.84

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Solution

The fourth proportional to 288,687.60, 398,380.61 and 159,623.84 is: 220,276.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,687.60 : 398,380.61 = 159,623.84 : x
  2. Step 2: Convert to fraction form
    288,687.60/398,380.61 = 159,623.84/x
  3. Step 3: Cross multiply
    288,687.60x = 398,380.61 × 159,623.84
  4. Step 4: Simplify right side
    288,687.60x = 63,591,039,959.72
  5. Step 5: Solve for x
    x = 63,591,039,959.72/288,687.60
  6. Step 6: Final answer
    x = 220,276.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.