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Finding the Fourth Proportional to 217,819.20, 326,728.80 and 146,960.40

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Solution

The fourth proportional to 217,819.20, 326,728.80 and 146,960.40 is: 220,440.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,819.20 : 326,728.80 = 146,960.40 : x
  2. Step 2: Convert to fraction form
    217,819.20/326,728.80 = 146,960.40/x
  3. Step 3: Cross multiply
    217,819.20x = 326,728.80 × 146,960.40
  4. Step 4: Simplify right side
    217,819.20x = 48,016,195,139.52
  5. Step 5: Solve for x
    x = 48,016,195,139.52/217,819.20
  6. Step 6: Final answer
    x = 220,440.60

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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.