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Finding the Fourth Proportional to 905.23, 1,358.17 and 472.08

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Solution

The fourth proportional to 905.23, 1,358.17 and 472.08 is: 708.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.23 : 1,358.17 = 472.08 : x
  2. Step 2: Convert to fraction form
    905.23/1,358.17 = 472.08/x
  3. Step 3: Cross multiply
    905.23x = 1,358.17 × 472.08
  4. Step 4: Simplify right side
    905.23x = 641,161.17
  5. Step 5: Solve for x
    x = 641,161.17/905.23
  6. Step 6: Final answer
    x = 708.29

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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.