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Finding the Fourth Proportional to 345,394.50, 518,067.99 and 212,295.30

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Solution

The fourth proportional to 345,394.50, 518,067.99 and 212,295.30 is: 318,428.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,394.50 : 518,067.99 = 212,295.30 : x
  2. Step 2: Convert to fraction form
    345,394.50/518,067.99 = 212,295.30/x
  3. Step 3: Cross multiply
    345,394.50x = 518,067.99 × 212,295.30
  4. Step 4: Simplify right side
    345,394.50x = 109,983,399,357.45
  5. Step 5: Solve for x
    x = 109,983,399,357.45/345,394.50
  6. Step 6: Final answer
    x = 318,428.35

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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.