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Finding the Fourth Proportional to 259.63, 358.21 and 154.68

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Solution

The fourth proportional to 259.63, 358.21 and 154.68 is: 213.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.63 : 358.21 = 154.68 : x
  2. Step 2: Convert to fraction form
    259.63/358.21 = 154.68/x
  3. Step 3: Cross multiply
    259.63x = 358.21 × 154.68
  4. Step 4: Simplify right side
    259.63x = 55,407.92
  5. Step 5: Solve for x
    x = 55,407.92/259.63
  6. Step 6: Final answer
    x = 213.41

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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.