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Finding the Fourth Proportional to 730.13, 1,095.80 and 345.38

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Solution

The fourth proportional to 730.13, 1,095.80 and 345.38 is: 518.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.13 : 1,095.80 = 345.38 : x
  2. Step 2: Convert to fraction form
    730.13/1,095.80 = 345.38/x
  3. Step 3: Cross multiply
    730.13x = 1,095.80 × 345.38
  4. Step 4: Simplify right side
    730.13x = 378,460.20
  5. Step 5: Solve for x
    x = 378,460.20/730.13
  6. Step 6: Final answer
    x = 518.35

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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.