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Finding the Fourth Proportional to 611,609.20, 917,413.80 and 442,772.80

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Solution

The fourth proportional to 611,609.20, 917,413.80 and 442,772.80 is: 664,159.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,609.20 : 917,413.80 = 442,772.80 : x
  2. Step 2: Convert to fraction form
    611,609.20/917,413.80 = 442,772.80/x
  3. Step 3: Cross multiply
    611,609.20x = 917,413.80 × 442,772.80
  4. Step 4: Simplify right side
    611,609.20x = 406,205,876,984.64
  5. Step 5: Solve for x
    x = 406,205,876,984.64/611,609.20
  6. Step 6: Final answer
    x = 664,159.20

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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.