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Finding the Fourth Proportional to 221,884.32, 332,943.60 and 128,455.20

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Solution

The fourth proportional to 221,884.32, 332,943.60 and 128,455.20 is: 192,750.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,884.32 : 332,943.60 = 128,455.20 : x
  2. Step 2: Convert to fraction form
    221,884.32/332,943.60 = 128,455.20/x
  3. Step 3: Cross multiply
    221,884.32x = 332,943.60 × 128,455.20
  4. Step 4: Simplify right side
    221,884.32x = 42,768,336,726.72
  5. Step 5: Solve for x
    x = 42,768,336,726.72/221,884.32
  6. Step 6: Final answer
    x = 192,750.60

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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.