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Finding the Fourth Proportional to 293.22, 405.15 and 256.32

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Solution

The fourth proportional to 293.22, 405.15 and 256.32 is: 354.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.22 : 405.15 = 256.32 : x
  2. Step 2: Convert to fraction form
    293.22/405.15 = 256.32/x
  3. Step 3: Cross multiply
    293.22x = 405.15 × 256.32
  4. Step 4: Simplify right side
    293.22x = 103,847.09
  5. Step 5: Solve for x
    x = 103,847.09/293.22
  6. Step 6: Final answer
    x = 354.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.