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Finding the Fourth Proportional to 259.42, 358.08 and 159.90

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Solution

The fourth proportional to 259.42, 358.08 and 159.90 is: 220.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.42 : 358.08 = 159.90 : x
  2. Step 2: Convert to fraction form
    259.42/358.08 = 159.90/x
  3. Step 3: Cross multiply
    259.42x = 358.08 × 159.90
  4. Step 4: Simplify right side
    259.42x = 57,256.99
  5. Step 5: Solve for x
    x = 57,256.99/259.42
  6. Step 6: Final answer
    x = 220.71

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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.