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Finding the Fourth Proportional to 348,527.80, 522,791.70 and 138,057.40

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Solution

The fourth proportional to 348,527.80, 522,791.70 and 138,057.40 is: 207,086.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,527.80 : 522,791.70 = 138,057.40 : x
  2. Step 2: Convert to fraction form
    348,527.80/522,791.70 = 138,057.40/x
  3. Step 3: Cross multiply
    348,527.80x = 522,791.70 × 138,057.40
  4. Step 4: Simplify right side
    348,527.80x = 72,175,262,843.58
  5. Step 5: Solve for x
    x = 72,175,262,843.58/348,527.80
  6. Step 6: Final answer
    x = 207,086.10

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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.