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Finding the Fourth Proportional to 396,868.79, 595,385.20 and 130,645.28

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Solution

The fourth proportional to 396,868.79, 595,385.20 and 130,645.28 is: 195,994.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,868.79 : 595,385.20 = 130,645.28 : x
  2. Step 2: Convert to fraction form
    396,868.79/595,385.20 = 130,645.28/x
  3. Step 3: Cross multiply
    396,868.79x = 595,385.20 × 130,645.28
  4. Step 4: Simplify right side
    396,868.79x = 77,784,266,161.86
  5. Step 5: Solve for x
    x = 77,784,266,161.86/396,868.79
  6. Step 6: Final answer
    x = 195,994.92

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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.