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Finding the Fourth Proportional to 259.77, 358.36 and 154.80

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Solution

The fourth proportional to 259.77, 358.36 and 154.80 is: 213.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.77 : 358.36 = 154.80 : x
  2. Step 2: Convert to fraction form
    259.77/358.36 = 154.80/x
  3. Step 3: Cross multiply
    259.77x = 358.36 × 154.80
  4. Step 4: Simplify right side
    259.77x = 55,474.13
  5. Step 5: Solve for x
    x = 55,474.13/259.77
  6. Step 6: Final answer
    x = 213.55

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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.