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Finding the Fourth Proportional to 319,391.28, 440,791.02 and 238,678.68

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Solution

The fourth proportional to 319,391.28, 440,791.02 and 238,678.68 is: 329,399.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,391.28 : 440,791.02 = 238,678.68 : x
  2. Step 2: Convert to fraction form
    319,391.28/440,791.02 = 238,678.68/x
  3. Step 3: Cross multiply
    319,391.28x = 440,791.02 × 238,678.68
  4. Step 4: Simplify right side
    319,391.28x = 105,207,418,809.45
  5. Step 5: Solve for x
    x = 105,207,418,809.45/319,391.28
  6. Step 6: Final answer
    x = 329,399.78

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1.5x scale

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.