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Finding the Fourth Proportional to 368,213.61, 508,131.45 and 207,069.78

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Solution

The fourth proportional to 368,213.61, 508,131.45 and 207,069.78 is: 285,754.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,213.61 : 508,131.45 = 207,069.78 : x
  2. Step 2: Convert to fraction form
    368,213.61/508,131.45 = 207,069.78/x
  3. Step 3: Cross multiply
    368,213.61x = 508,131.45 × 207,069.78
  4. Step 4: Simplify right side
    368,213.61x = 105,218,667,562.58
  5. Step 5: Solve for x
    x = 105,218,667,562.58/368,213.61
  6. Step 6: Final answer
    x = 285,754.42

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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.