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Finding the Fourth Proportional to 206,413.20, 309,328.20 and 152,685.90

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Solution

The fourth proportional to 206,413.20, 309,328.20 and 152,685.90 is: 228,813.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,413.20 : 309,328.20 = 152,685.90 : x
  2. Step 2: Convert to fraction form
    206,413.20/309,328.20 = 152,685.90/x
  3. Step 3: Cross multiply
    206,413.20x = 309,328.20 × 152,685.90
  4. Step 4: Simplify right side
    206,413.20x = 47,230,054,612.38
  5. Step 5: Solve for x
    x = 47,230,054,612.38/206,413.20
  6. Step 6: Final answer
    x = 228,813.15

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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.