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Finding the Fourth Proportional to 382,499.78, 527,868.39 and 212,730.26

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Solution

The fourth proportional to 382,499.78, 527,868.39 and 212,730.26 is: 293,578.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,499.78 : 527,868.39 = 212,730.26 : x
  2. Step 2: Convert to fraction form
    382,499.78/527,868.39 = 212,730.26/x
  3. Step 3: Cross multiply
    382,499.78x = 527,868.39 × 212,730.26
  4. Step 4: Simplify right side
    382,499.78x = 112,293,579,850.48
  5. Step 5: Solve for x
    x = 112,293,579,850.48/382,499.78
  6. Step 6: Final answer
    x = 293,578.16

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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.