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Finding the Fourth Proportional to 238,646, 329,323.05 and 131,215.28

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Solution

The fourth proportional to 238,646, 329,323.05 and 131,215.28 is: 181,072.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,646 : 329,323.05 = 131,215.28 : x
  2. Step 2: Convert to fraction form
    238,646/329,323.05 = 131,215.28/x
  3. Step 3: Cross multiply
    238,646x = 329,323.05 × 131,215.28
  4. Step 4: Simplify right side
    238,646x = 43,212,216,216.20
  5. Step 5: Solve for x
    x = 43,212,216,216.20/238,646
  6. Step 6: Final answer
    x = 181,072.45

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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.