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Finding the Fourth Proportional to 259.61, 358.27 and 143.17

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Solution

The fourth proportional to 259.61, 358.27 and 143.17 is: 197.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.61 : 358.27 = 143.17 : x
  2. Step 2: Convert to fraction form
    259.61/358.27 = 143.17/x
  3. Step 3: Cross multiply
    259.61x = 358.27 × 143.17
  4. Step 4: Simplify right side
    259.61x = 51,293.52
  5. Step 5: Solve for x
    x = 51,293.52/259.61
  6. Step 6: Final answer
    x = 197.58

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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.