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Finding the Fourth Proportional to 267,628.79, 401,443.85 and 90,260.39

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Solution

The fourth proportional to 267,628.79, 401,443.85 and 90,260.39 is: 135,390.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,628.79 : 401,443.85 = 90,260.39 : x
  2. Step 2: Convert to fraction form
    267,628.79/401,443.85 = 90,260.39/x
  3. Step 3: Cross multiply
    267,628.79x = 401,443.85 × 90,260.39
  4. Step 4: Simplify right side
    267,628.79x = 36,234,476,682.53
  5. Step 5: Solve for x
    x = 36,234,476,682.53/267,628.79
  6. Step 6: Final answer
    x = 135,390.81

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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.