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Finding the Fourth Proportional to 328,393.25, 492,610.65 and 138,818.29

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Solution

The fourth proportional to 328,393.25, 492,610.65 and 138,818.29 is: 208,236.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,393.25 : 492,610.65 = 138,818.29 : x
  2. Step 2: Convert to fraction form
    328,393.25/492,610.65 = 138,818.29/x
  3. Step 3: Cross multiply
    328,393.25x = 492,610.65 × 138,818.29
  4. Step 4: Simplify right side
    328,393.25x = 68,383,366,316.69
  5. Step 5: Solve for x
    x = 68,383,366,316.69/328,393.25
  6. Step 6: Final answer
    x = 208,236.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.