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Finding the Fourth Proportional to 431,806.80, 647,710.20 and 341,605.20

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Solution

The fourth proportional to 431,806.80, 647,710.20 and 341,605.20 is: 512,407.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,806.80 : 647,710.20 = 341,605.20 : x
  2. Step 2: Convert to fraction form
    431,806.80/647,710.20 = 341,605.20/x
  3. Step 3: Cross multiply
    431,806.80x = 647,710.20 × 341,605.20
  4. Step 4: Simplify right side
    431,806.80x = 221,261,172,413.04
  5. Step 5: Solve for x
    x = 221,261,172,413.04/431,806.80
  6. Step 6: Final answer
    x = 512,407.80

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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.