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Finding the Fourth Proportional to 418,435.40, 627,650.22 and 137,975.24

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Solution

The fourth proportional to 418,435.40, 627,650.22 and 137,975.24 is: 206,961.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,435.40 : 627,650.22 = 137,975.24 : x
  2. Step 2: Convert to fraction form
    418,435.40/627,650.22 = 137,975.24/x
  3. Step 3: Cross multiply
    418,435.40x = 627,650.22 × 137,975.24
  4. Step 4: Simplify right side
    418,435.40x = 86,600,189,740.55
  5. Step 5: Solve for x
    x = 86,600,189,740.55/418,435.40
  6. Step 6: Final answer
    x = 206,961.91

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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.