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Finding the Fourth Proportional to 293.31, 440.28 and 259.29

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Solution

The fourth proportional to 293.31, 440.28 and 259.29 is: 389.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.31 : 440.28 = 259.29 : x
  2. Step 2: Convert to fraction form
    293.31/440.28 = 259.29/x
  3. Step 3: Cross multiply
    293.31x = 440.28 × 259.29
  4. Step 4: Simplify right side
    293.31x = 114,160.20
  5. Step 5: Solve for x
    x = 114,160.20/293.31
  6. Step 6: Final answer
    x = 389.21

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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.