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Finding the Fourth Proportional to 445,071.20, 667,606.80 and 326,098.40

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Solution

The fourth proportional to 445,071.20, 667,606.80 and 326,098.40 is: 489,147.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,071.20 : 667,606.80 = 326,098.40 : x
  2. Step 2: Convert to fraction form
    445,071.20/667,606.80 = 326,098.40/x
  3. Step 3: Cross multiply
    445,071.20x = 667,606.80 × 326,098.40
  4. Step 4: Simplify right side
    445,071.20x = 217,705,509,309.12
  5. Step 5: Solve for x
    x = 217,705,509,309.12/445,071.20
  6. Step 6: Final answer
    x = 489,147.60

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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.