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Finding the Fourth Proportional to 345,908.80, 518,863.20 and 121,522.60

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Solution

The fourth proportional to 345,908.80, 518,863.20 and 121,522.60 is: 182,283.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,908.80 : 518,863.20 = 121,522.60 : x
  2. Step 2: Convert to fraction form
    345,908.80/518,863.20 = 121,522.60/x
  3. Step 3: Cross multiply
    345,908.80x = 518,863.20 × 121,522.60
  4. Step 4: Simplify right side
    345,908.80x = 63,053,605,108.32
  5. Step 5: Solve for x
    x = 63,053,605,108.32/345,908.80
  6. Step 6: Final answer
    x = 182,283.90

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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.