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Finding the Fourth Proportional to 268,413.20, 402,619.80 and 143,997.20

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Solution

The fourth proportional to 268,413.20, 402,619.80 and 143,997.20 is: 215,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,413.20 : 402,619.80 = 143,997.20 : x
  2. Step 2: Convert to fraction form
    268,413.20/402,619.80 = 143,997.20/x
  3. Step 3: Cross multiply
    268,413.20x = 402,619.80 × 143,997.20
  4. Step 4: Simplify right side
    268,413.20x = 57,976,123,864.56
  5. Step 5: Solve for x
    x = 57,976,123,864.56/268,413.20
  6. Step 6: Final answer
    x = 215,995.80

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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.