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Finding the Fourth Proportional to 396,878.79, 595,400.22 and 130,655.28

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Solution

The fourth proportional to 396,878.79, 595,400.22 and 130,655.28 is: 196,009.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,878.79 : 595,400.22 = 130,655.28 : x
  2. Step 2: Convert to fraction form
    396,878.79/595,400.22 = 130,655.28/x
  3. Step 3: Cross multiply
    396,878.79x = 595,400.22 × 130,655.28
  4. Step 4: Simplify right side
    396,878.79x = 77,792,182,456.16
  5. Step 5: Solve for x
    x = 77,792,182,456.16/396,878.79
  6. Step 6: Final answer
    x = 196,009.93

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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.