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Finding the Fourth Proportional to 259.41, 358.13 and 189.40

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Solution

The fourth proportional to 259.41, 358.13 and 189.40 is: 261.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.41 : 358.13 = 189.40 : x
  2. Step 2: Convert to fraction form
    259.41/358.13 = 189.40/x
  3. Step 3: Cross multiply
    259.41x = 358.13 × 189.40
  4. Step 4: Simplify right side
    259.41x = 67,829.82
  5. Step 5: Solve for x
    x = 67,829.82/259.41
  6. Step 6: Final answer
    x = 261.48

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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.