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Finding the Fourth Proportional to 906.26, 1,358.42 and 358.20

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Solution

The fourth proportional to 906.26, 1,358.42 and 358.20 is: 536.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.26 : 1,358.42 = 358.20 : x
  2. Step 2: Convert to fraction form
    906.26/1,358.42 = 358.20/x
  3. Step 3: Cross multiply
    906.26x = 1,358.42 × 358.20
  4. Step 4: Simplify right side
    906.26x = 486,584.25
  5. Step 5: Solve for x
    x = 486,584.25/906.26
  6. Step 6: Final answer
    x = 536.92

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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.