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Finding the Fourth Proportional to 554,704.39, 765,538.86 and 312,997.15

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Solution

The fourth proportional to 554,704.39, 765,538.86 and 312,997.15 is: 431,962.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,704.39 : 765,538.86 = 312,997.15 : x
  2. Step 2: Convert to fraction form
    554,704.39/765,538.86 = 312,997.15/x
  3. Step 3: Cross multiply
    554,704.39x = 765,538.86 × 312,997.15
  4. Step 4: Simplify right side
    554,704.39x = 239,611,481,394.25
  5. Step 5: Solve for x
    x = 239,611,481,394.25/554,704.39
  6. Step 6: Final answer
    x = 431,962.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.