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Finding the Fourth Proportional to 260,413.35, 390,651.27 and 91,898.88

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Solution

The fourth proportional to 260,413.35, 390,651.27 and 91,898.88 is: 137,859.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,413.35 : 390,651.27 = 91,898.88 : x
  2. Step 2: Convert to fraction form
    260,413.35/390,651.27 = 91,898.88/x
  3. Step 3: Cross multiply
    260,413.35x = 390,651.27 × 91,898.88
  4. Step 4: Simplify right side
    260,413.35x = 35,900,414,183.58
  5. Step 5: Solve for x
    x = 35,900,414,183.58/260,413.35
  6. Step 6: Final answer
    x = 137,859.35

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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.