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Finding the Fourth Proportional to 328,873.80, 493,310.70 and 261,951.60

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Solution

The fourth proportional to 328,873.80, 493,310.70 and 261,951.60 is: 392,927.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,873.80 : 493,310.70 = 261,951.60 : x
  2. Step 2: Convert to fraction form
    328,873.80/493,310.70 = 261,951.60/x
  3. Step 3: Cross multiply
    328,873.80x = 493,310.70 × 261,951.60
  4. Step 4: Simplify right side
    328,873.80x = 129,223,527,162.12
  5. Step 5: Solve for x
    x = 129,223,527,162.12/328,873.80
  6. Step 6: Final answer
    x = 392,927.40

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Similar ratio
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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.