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Finding the Fourth Proportional to 326,440.20, 489,660.30 and 315,035.40

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Solution

The fourth proportional to 326,440.20, 489,660.30 and 315,035.40 is: 472,553.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,440.20 : 489,660.30 = 315,035.40 : x
  2. Step 2: Convert to fraction form
    326,440.20/489,660.30 = 315,035.40/x
  3. Step 3: Cross multiply
    326,440.20x = 489,660.30 × 315,035.40
  4. Step 4: Simplify right side
    326,440.20x = 154,260,328,474.62
  5. Step 5: Solve for x
    x = 154,260,328,474.62/326,440.20
  6. Step 6: Final answer
    x = 472,553.10

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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.