Home / 521,120.20-781,087.34-221,413.72

Finding the Fourth Proportional to 521,120.20, 781,087.34 and 221,413.72

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Solution

The fourth proportional to 521,120.20, 781,087.34 and 221,413.72 is: 331,868.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,120.20 : 781,087.34 = 221,413.72 : x
  2. Step 2: Convert to fraction form
    521,120.20/781,087.34 = 221,413.72/x
  3. Step 3: Cross multiply
    521,120.20x = 781,087.34 × 221,413.72
  4. Step 4: Simplify right side
    521,120.20x = 172,943,453,594.31
  5. Step 5: Solve for x
    x = 172,943,453,594.31/521,120.20
  6. Step 6: Final answer
    x = 331,868.64

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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.