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Finding the Fourth Proportional to 439,741.80, 659,871.90 and 290,413.80

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Solution

The fourth proportional to 439,741.80, 659,871.90 and 290,413.80 is: 435,791.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,741.80 : 659,871.90 = 290,413.80 : x
  2. Step 2: Convert to fraction form
    439,741.80/659,871.90 = 290,413.80/x
  3. Step 3: Cross multiply
    439,741.80x = 659,871.90 × 290,413.80
  4. Step 4: Simplify right side
    439,741.80x = 191,635,905,992.22
  5. Step 5: Solve for x
    x = 191,635,905,992.22/439,741.80
  6. Step 6: Final answer
    x = 435,791.88

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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.