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Finding the Fourth Proportional to 220,246.32, 330,391.29 and 70,449

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Solution

The fourth proportional to 220,246.32, 330,391.29 and 70,449 is: 105,680.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,246.32 : 330,391.29 = 70,449 : x
  2. Step 2: Convert to fraction form
    220,246.32/330,391.29 = 70,449/x
  3. Step 3: Cross multiply
    220,246.32x = 330,391.29 × 70,449
  4. Step 4: Simplify right side
    220,246.32x = 23,275,735,989.21
  5. Step 5: Solve for x
    x = 23,275,735,989.21/220,246.32
  6. Step 6: Final answer
    x = 105,680.48

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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.