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Finding the Fourth Proportional to 865,609.20, 1,298,413.80 and 492,361.20

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Solution

The fourth proportional to 865,609.20, 1,298,413.80 and 492,361.20 is: 738,541.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,609.20 : 1,298,413.80 = 492,361.20 : x
  2. Step 2: Convert to fraction form
    865,609.20/1,298,413.80 = 492,361.20/x
  3. Step 3: Cross multiply
    865,609.20x = 1,298,413.80 × 492,361.20
  4. Step 4: Simplify right side
    865,609.20x = 639,288,576,664.56
  5. Step 5: Solve for x
    x = 639,288,576,664.56/865,609.20
  6. Step 6: Final answer
    x = 738,541.80

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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.