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Finding the Fourth Proportional to 378,393.78, 566,431.53 and 245,008.65

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Solution

The fourth proportional to 378,393.78, 566,431.53 and 245,008.65 is: 366,762.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,393.78 : 566,431.53 = 245,008.65 : x
  2. Step 2: Convert to fraction form
    378,393.78/566,431.53 = 245,008.65/x
  3. Step 3: Cross multiply
    378,393.78x = 566,431.53 × 245,008.65
  4. Step 4: Simplify right side
    378,393.78x = 138,780,623,880.07
  5. Step 5: Solve for x
    x = 138,780,623,880.07/378,393.78
  6. Step 6: Final answer
    x = 366,762.44

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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.