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Finding the Fourth Proportional to 408,029.60, 612,044.40 and 405,696.80

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Solution

The fourth proportional to 408,029.60, 612,044.40 and 405,696.80 is: 608,545.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,029.60 : 612,044.40 = 405,696.80 : x
  2. Step 2: Convert to fraction form
    408,029.60/612,044.40 = 405,696.80/x
  3. Step 3: Cross multiply
    408,029.60x = 612,044.40 × 405,696.80
  4. Step 4: Simplify right side
    408,029.60x = 248,304,454,537.92
  5. Step 5: Solve for x
    x = 248,304,454,537.92/408,029.60
  6. Step 6: Final answer
    x = 608,545.20

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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.