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Finding the Fourth Proportional to 730.87, 1,095.34 and 345.31

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Solution

The fourth proportional to 730.87, 1,095.34 and 345.31 is: 517.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.87 : 1,095.34 = 345.31 : x
  2. Step 2: Convert to fraction form
    730.87/1,095.34 = 345.31/x
  3. Step 3: Cross multiply
    730.87x = 1,095.34 × 345.31
  4. Step 4: Simplify right side
    730.87x = 378,231.86
  5. Step 5: Solve for x
    x = 378,231.86/730.87
  6. Step 6: Final answer
    x = 517.51

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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.