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Finding the Fourth Proportional to 396,870.79, 595,388.19 and 130,647.28

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Solution

The fourth proportional to 396,870.79, 595,388.19 and 130,647.28 is: 195,997.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,870.79 : 595,388.19 = 130,647.28 : x
  2. Step 2: Convert to fraction form
    396,870.79/595,388.19 = 130,647.28/x
  3. Step 3: Cross multiply
    396,870.79x = 595,388.19 × 130,647.28
  4. Step 4: Simplify right side
    396,870.79x = 77,785,847,567.62
  5. Step 5: Solve for x
    x = 77,785,847,567.62/396,870.79
  6. Step 6: Final answer
    x = 195,997.92

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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.