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Finding the Fourth Proportional to 730.27, 1,095.42 and 405.66

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Solution

The fourth proportional to 730.27, 1,095.42 and 405.66 is: 608.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.27 : 1,095.42 = 405.66 : x
  2. Step 2: Convert to fraction form
    730.27/1,095.42 = 405.66/x
  3. Step 3: Cross multiply
    730.27x = 1,095.42 × 405.66
  4. Step 4: Simplify right side
    730.27x = 444,367.54
  5. Step 5: Solve for x
    x = 444,367.54/730.27
  6. Step 6: Final answer
    x = 608.50

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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.