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Finding the Fourth Proportional to 396,871.79, 595,389.69 and 130,648.28

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Solution

The fourth proportional to 396,871.79, 595,389.69 and 130,648.28 is: 195,999.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,871.79 : 595,389.69 = 130,648.28 : x
  2. Step 2: Convert to fraction form
    396,871.79/595,389.69 = 130,648.28/x
  3. Step 3: Cross multiply
    396,871.79x = 595,389.69 × 130,648.28
  4. Step 4: Simplify right side
    396,871.79x = 77,786,638,928.23
  5. Step 5: Solve for x
    x = 77,786,638,928.23/396,871.79
  6. Step 6: Final answer
    x = 195,999.42

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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.