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Finding the Fourth Proportional to 398,786.94, 550,306.56 and 237,638.40

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Solution

The fourth proportional to 398,786.94, 550,306.56 and 237,638.40 is: 327,929.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,786.94 : 550,306.56 = 237,638.40 : x
  2. Step 2: Convert to fraction form
    398,786.94/550,306.56 = 237,638.40/x
  3. Step 3: Cross multiply
    398,786.94x = 550,306.56 × 237,638.40
  4. Step 4: Simplify right side
    398,786.94x = 130,773,970,427.90
  5. Step 5: Solve for x
    x = 130,773,970,427.90/398,786.94
  6. Step 6: Final answer
    x = 327,929.42

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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.