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Finding the Fourth Proportional to 221,474.79, 305,528.90 and 144,960.20

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Solution

The fourth proportional to 221,474.79, 305,528.90 and 144,960.20 is: 199,975.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,474.79 : 305,528.90 = 144,960.20 : x
  2. Step 2: Convert to fraction form
    221,474.79/305,528.90 = 144,960.20/x
  3. Step 3: Cross multiply
    221,474.79x = 305,528.90 × 144,960.20
  4. Step 4: Simplify right side
    221,474.79x = 44,289,530,449.78
  5. Step 5: Solve for x
    x = 44,289,530,449.78/221,474.79
  6. Step 6: Final answer
    x = 199,975.49

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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.