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Finding the Fourth Proportional to 396,686.64, 595,067.76 and 130,449.36

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Solution

The fourth proportional to 396,686.64, 595,067.76 and 130,449.36 is: 195,686.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,686.64 : 595,067.76 = 130,449.36 : x
  2. Step 2: Convert to fraction form
    396,686.64/595,067.76 = 130,449.36/x
  3. Step 3: Cross multiply
    396,686.64x = 595,067.76 × 130,449.36
  4. Step 4: Simplify right side
    396,686.64x = 77,626,208,448.63
  5. Step 5: Solve for x
    x = 77,626,208,448.63/396,686.64
  6. Step 6: Final answer
    x = 195,686.47

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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.