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Finding the Fourth Proportional to 259.34, 357.91 and 154.46

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Solution

The fourth proportional to 259.34, 357.91 and 154.46 is: 213.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.34 : 357.91 = 154.46 : x
  2. Step 2: Convert to fraction form
    259.34/357.91 = 154.46/x
  3. Step 3: Cross multiply
    259.34x = 357.91 × 154.46
  4. Step 4: Simplify right side
    259.34x = 55,283.29
  5. Step 5: Solve for x
    x = 55,283.29/259.34
  6. Step 6: Final answer
    x = 213.17

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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.