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Finding the Fourth Proportional to 345,864.20, 518,310.30 and 274,908.20

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Solution

The fourth proportional to 345,864.20, 518,310.30 and 274,908.20 is: 411,976.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,864.20 : 518,310.30 = 274,908.20 : x
  2. Step 2: Convert to fraction form
    345,864.20/518,310.30 = 274,908.20/x
  3. Step 3: Cross multiply
    345,864.20x = 518,310.30 × 274,908.20
  4. Step 4: Simplify right side
    345,864.20x = 142,487,751,614.46
  5. Step 5: Solve for x
    x = 142,487,751,614.46/345,864.20
  6. Step 6: Final answer
    x = 411,976.01

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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.