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Finding the Fourth Proportional to 445,518.40, 667,111.20 and 326,545.60

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Solution

The fourth proportional to 445,518.40, 667,111.20 and 326,545.60 is: 488,963.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,518.40 : 667,111.20 = 326,545.60 : x
  2. Step 2: Convert to fraction form
    445,518.40/667,111.20 = 326,545.60/x
  3. Step 3: Cross multiply
    445,518.40x = 667,111.20 × 326,545.60
  4. Step 4: Simplify right side
    445,518.40x = 217,842,227,070.72
  5. Step 5: Solve for x
    x = 217,842,227,070.72/445,518.40
  6. Step 6: Final answer
    x = 488,963.48

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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.