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Finding the Fourth Proportional to 259.06, 356.91 and 215.26

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Solution

The fourth proportional to 259.06, 356.91 and 215.26 is: 296.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.06 : 356.91 = 215.26 : x
  2. Step 2: Convert to fraction form
    259.06/356.91 = 215.26/x
  3. Step 3: Cross multiply
    259.06x = 356.91 × 215.26
  4. Step 4: Simplify right side
    259.06x = 76,828.45
  5. Step 5: Solve for x
    x = 76,828.45/259.06
  6. Step 6: Final answer
    x = 296.57

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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.