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Finding the Fourth Proportional to 404,328.80, 605,618.40 and 262,611.20

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Solution

The fourth proportional to 404,328.80, 605,618.40 and 262,611.20 is: 393,348.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,328.80 : 605,618.40 = 262,611.20 : x
  2. Step 2: Convert to fraction form
    404,328.80/605,618.40 = 262,611.20/x
  3. Step 3: Cross multiply
    404,328.80x = 605,618.40 × 262,611.20
  4. Step 4: Simplify right side
    404,328.80x = 159,042,174,766.08
  5. Step 5: Solve for x
    x = 159,042,174,766.08/404,328.80
  6. Step 6: Final answer
    x = 393,348.62

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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.