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Finding the Fourth Proportional to 398,719.54, 550,217.59 and 226,660.12

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Solution

The fourth proportional to 398,719.54, 550,217.59 and 226,660.12 is: 312,782.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,719.54 : 550,217.59 = 226,660.12 : x
  2. Step 2: Convert to fraction form
    398,719.54/550,217.59 = 226,660.12/x
  3. Step 3: Cross multiply
    398,719.54x = 550,217.59 × 226,660.12
  4. Step 4: Simplify right side
    398,719.54x = 124,712,384,975.51
  5. Step 5: Solve for x
    x = 124,712,384,975.51/398,719.54
  6. Step 6: Final answer
    x = 312,782.23

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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.