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Finding the Fourth Proportional to 293.06, 405.07 and 257.06

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Solution

The fourth proportional to 293.06, 405.07 and 257.06 is: 355.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.06 : 405.07 = 257.06 : x
  2. Step 2: Convert to fraction form
    293.06/405.07 = 257.06/x
  3. Step 3: Cross multiply
    293.06x = 405.07 × 257.06
  4. Step 4: Simplify right side
    293.06x = 104,127.29
  5. Step 5: Solve for x
    x = 104,127.29/293.06
  6. Step 6: Final answer
    x = 355.31

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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.