Home / 305,938.12-421,960.98-221,335.24

Finding the Fourth Proportional to 305,938.12, 421,960.98 and 221,335.24

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Solution

The fourth proportional to 305,938.12, 421,960.98 and 221,335.24 is: 305,273.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,938.12 : 421,960.98 = 221,335.24 : x
  2. Step 2: Convert to fraction form
    305,938.12/421,960.98 = 221,335.24/x
  3. Step 3: Cross multiply
    305,938.12x = 421,960.98 × 221,335.24
  4. Step 4: Simplify right side
    305,938.12x = 93,394,834,778.94
  5. Step 5: Solve for x
    x = 93,394,834,778.94/305,938.12
  6. Step 6: Final answer
    x = 305,273.61

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1.5x scale

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.