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Finding the Fourth Proportional to 264,478, 396,717 and 67,486

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Solution

The fourth proportional to 264,478, 396,717 and 67,486 is: 101,229

Step by Step Solution

  1. Step 1: Write the proportion equation
    264,478 : 396,717 = 67,486 : x
  2. Step 2: Convert to fraction form
    264,478/396,717 = 67,486/x
  3. Step 3: Cross multiply
    264,478x = 396,717 × 67,486
  4. Step 4: Simplify right side
    264,478x = 26,772,843,462
  5. Step 5: Solve for x
    x = 26,772,843,462/264,478
  6. Step 6: Final answer
    x = 101,229

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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.