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Finding the Fourth Proportional to 906.14, 1,358.30 and 358.11

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Solution

The fourth proportional to 906.14, 1,358.30 and 358.11 is: 536.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.14 : 1,358.30 = 358.11 : x
  2. Step 2: Convert to fraction form
    906.14/1,358.30 = 358.11/x
  3. Step 3: Cross multiply
    906.14x = 1,358.30 × 358.11
  4. Step 4: Simplify right side
    906.14x = 486,419.02
  5. Step 5: Solve for x
    x = 486,419.02/906.14
  6. Step 6: Final answer
    x = 536.81

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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.