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Finding the Fourth Proportional to 221,322.40, 332,329.20 and 128,010.40

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Solution

The fourth proportional to 221,322.40, 332,329.20 and 128,010.40 is: 192,215.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,322.40 : 332,329.20 = 128,010.40 : x
  2. Step 2: Convert to fraction form
    221,322.40/332,329.20 = 128,010.40/x
  3. Step 3: Cross multiply
    221,322.40x = 332,329.20 × 128,010.40
  4. Step 4: Simplify right side
    221,322.40x = 42,541,593,823.68
  5. Step 5: Solve for x
    x = 42,541,593,823.68/221,322.40
  6. Step 6: Final answer
    x = 192,215.49

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1.5x scale

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.