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Finding the Fourth Proportional to 638,448.62, 955,307.36 and 511,704.46

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Solution

The fourth proportional to 638,448.62, 955,307.36 and 511,704.46 is: 765,660.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,448.62 : 955,307.36 = 511,704.46 : x
  2. Step 2: Convert to fraction form
    638,448.62/955,307.36 = 511,704.46/x
  3. Step 3: Cross multiply
    638,448.62x = 955,307.36 × 511,704.46
  4. Step 4: Simplify right side
    638,448.62x = 488,835,036,782.83
  5. Step 5: Solve for x
    x = 488,835,036,782.83/638,448.62
  6. Step 6: Final answer
    x = 765,660.73

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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.