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Finding the Fourth Proportional to 260,511.90, 391,168.80 and 142,413.90

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Solution

The fourth proportional to 260,511.90, 391,168.80 and 142,413.90 is: 213,840.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,511.90 : 391,168.80 = 142,413.90 : x
  2. Step 2: Convert to fraction form
    260,511.90/391,168.80 = 142,413.90/x
  3. Step 3: Cross multiply
    260,511.90x = 391,168.80 × 142,413.90
  4. Step 4: Simplify right side
    260,511.90x = 55,707,874,366.32
  5. Step 5: Solve for x
    x = 55,707,874,366.32/260,511.90
  6. Step 6: Final answer
    x = 213,840.04

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1.5x scale

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.