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Finding the Fourth Proportional to 345,940.92, 518,532.30 and 135,347.40

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Solution

The fourth proportional to 345,940.92, 518,532.30 and 135,347.40 is: 202,872.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,940.92 : 518,532.30 = 135,347.40 : x
  2. Step 2: Convert to fraction form
    345,940.92/518,532.30 = 135,347.40/x
  3. Step 3: Cross multiply
    345,940.92x = 518,532.30 × 135,347.40
  4. Step 4: Simplify right side
    345,940.92x = 70,181,998,621.02
  5. Step 5: Solve for x
    x = 70,181,998,621.02/345,940.92
  6. Step 6: Final answer
    x = 202,872.79

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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.