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Finding the Fourth Proportional to 906.06, 1,358.87 and 418.64

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Solution

The fourth proportional to 906.06, 1,358.87 and 418.64 is: 627.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.06 : 1,358.87 = 418.64 : x
  2. Step 2: Convert to fraction form
    906.06/1,358.87 = 418.64/x
  3. Step 3: Cross multiply
    906.06x = 1,358.87 × 418.64
  4. Step 4: Simplify right side
    906.06x = 568,881.78
  5. Step 5: Solve for x
    x = 568,881.78/906.06
  6. Step 6: Final answer
    x = 627.86

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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.