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Finding the Fourth Proportional to 331,661.28, 457,703.28 and 188,418.72

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Solution

The fourth proportional to 331,661.28, 457,703.28 and 188,418.72 is: 260,023.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,661.28 : 457,703.28 = 188,418.72 : x
  2. Step 2: Convert to fraction form
    331,661.28/457,703.28 = 188,418.72/x
  3. Step 3: Cross multiply
    331,661.28x = 457,703.28 × 188,418.72
  4. Step 4: Simplify right side
    331,661.28x = 86,239,866,157.40
  5. Step 5: Solve for x
    x = 86,239,866,157.40/331,661.28
  6. Step 6: Final answer
    x = 260,023.92

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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.