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Finding the Fourth Proportional to 388,926.38, 536,434.88 and 297,252.78

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Solution

The fourth proportional to 388,926.38, 536,434.88 and 297,252.78 is: 409,992.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,926.38 : 536,434.88 = 297,252.78 : x
  2. Step 2: Convert to fraction form
    388,926.38/536,434.88 = 297,252.78/x
  3. Step 3: Cross multiply
    388,926.38x = 536,434.88 × 297,252.78
  4. Step 4: Simplify right side
    388,926.38x = 159,456,757,882.70
  5. Step 5: Solve for x
    x = 159,456,757,882.70/388,926.38
  6. Step 6: Final answer
    x = 409,992.14

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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.