Home / 280,718.40-387,413.46-159,864.78

Finding the Fourth Proportional to 280,718.40, 387,413.46 and 159,864.78

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Solution

The fourth proportional to 280,718.40, 387,413.46 and 159,864.78 is: 220,625.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,718.40 : 387,413.46 = 159,864.78 : x
  2. Step 2: Convert to fraction form
    280,718.40/387,413.46 = 159,864.78/x
  3. Step 3: Cross multiply
    280,718.40x = 387,413.46 × 159,864.78
  4. Step 4: Simplify right side
    280,718.40x = 61,933,767,551.94
  5. Step 5: Solve for x
    x = 61,933,767,551.94/280,718.40
  6. Step 6: Final answer
    x = 220,625.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.