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Finding the Fourth Proportional to 351,449.58, 527,390.94 and 138,180

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Solution

The fourth proportional to 351,449.58, 527,390.94 and 138,180 is: 207,355.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,449.58 : 527,390.94 = 138,180 : x
  2. Step 2: Convert to fraction form
    351,449.58/527,390.94 = 138,180/x
  3. Step 3: Cross multiply
    351,449.58x = 527,390.94 × 138,180
  4. Step 4: Simplify right side
    351,449.58x = 72,874,880,089.20
  5. Step 5: Solve for x
    x = 72,874,880,089.20/351,449.58
  6. Step 6: Final answer
    x = 207,355.15

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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.