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Finding the Fourth Proportional to 679,340.52, 937,469.66 and 388,942.47

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Solution

The fourth proportional to 679,340.52, 937,469.66 and 388,942.47 is: 536,729.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,340.52 : 937,469.66 = 388,942.47 : x
  2. Step 2: Convert to fraction form
    679,340.52/937,469.66 = 388,942.47/x
  3. Step 3: Cross multiply
    679,340.52x = 937,469.66 × 388,942.47
  4. Step 4: Simplify right side
    679,340.52x = 364,621,763,165.75
  5. Step 5: Solve for x
    x = 364,621,763,165.75/679,340.52
  6. Step 6: Final answer
    x = 536,729.01

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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.