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Finding the Fourth Proportional to 259.66, 358.35 and 143.25

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Solution

The fourth proportional to 259.66, 358.35 and 143.25 is: 197.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.66 : 358.35 = 143.25 : x
  2. Step 2: Convert to fraction form
    259.66/358.35 = 143.25/x
  3. Step 3: Cross multiply
    259.66x = 358.35 × 143.25
  4. Step 4: Simplify right side
    259.66x = 51,331.85
  5. Step 5: Solve for x
    x = 51,331.85/259.66
  6. Step 6: Final answer
    x = 197.69

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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.