Home / 305,937.12-421,959.60-221,334.24

Finding the Fourth Proportional to 305,937.12, 421,959.60 and 221,334.24

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Solution

The fourth proportional to 305,937.12, 421,959.60 and 221,334.24 is: 305,272.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,937.12 : 421,959.60 = 221,334.24 : x
  2. Step 2: Convert to fraction form
    305,937.12/421,959.60 = 221,334.24/x
  3. Step 3: Cross multiply
    305,937.12x = 421,959.60 × 221,334.24
  4. Step 4: Simplify right side
    305,937.12x = 93,394,107,376.70
  5. Step 5: Solve for x
    x = 93,394,107,376.70/305,937.12
  6. Step 6: Final answer
    x = 305,272.23

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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.