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Finding the Fourth Proportional to 319,388.28, 440,786.88 and 238,675.68

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Solution

The fourth proportional to 319,388.28, 440,786.88 and 238,675.68 is: 329,395.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,388.28 : 440,786.88 = 238,675.68 : x
  2. Step 2: Convert to fraction form
    319,388.28/440,786.88 = 238,675.68/x
  3. Step 3: Cross multiply
    319,388.28x = 440,786.88 × 238,675.68
  4. Step 4: Simplify right side
    319,388.28x = 105,205,108,319.08
  5. Step 5: Solve for x
    x = 105,205,108,319.08/319,388.28
  6. Step 6: Final answer
    x = 329,395.64

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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.