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Finding the Fourth Proportional to 396,866.79, 595,382.20 and 130,643.28

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Solution

The fourth proportional to 396,866.79, 595,382.20 and 130,643.28 is: 195,991.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,866.79 : 595,382.20 = 130,643.28 : x
  2. Step 2: Convert to fraction form
    396,866.79/595,382.20 = 130,643.28/x
  3. Step 3: Cross multiply
    396,866.79x = 595,382.20 × 130,643.28
  4. Step 4: Simplify right side
    396,866.79x = 77,782,683,135.01
  5. Step 5: Solve for x
    x = 77,782,683,135.01/396,866.79
  6. Step 6: Final answer
    x = 195,991.92

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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.