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Finding the Fourth Proportional to 259.80, 358.47 and 172.44

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Solution

The fourth proportional to 259.80, 358.47 and 172.44 is: 237.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.80 : 358.47 = 172.44 : x
  2. Step 2: Convert to fraction form
    259.80/358.47 = 172.44/x
  3. Step 3: Cross multiply
    259.80x = 358.47 × 172.44
  4. Step 4: Simplify right side
    259.80x = 61,814.57
  5. Step 5: Solve for x
    x = 61,814.57/259.80
  6. Step 6: Final answer
    x = 237.93

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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.