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Finding the Fourth Proportional to 269.98, 404.40 and 172.54

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Solution

The fourth proportional to 269.98, 404.40 and 172.54 is: 258.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.98 : 404.40 = 172.54 : x
  2. Step 2: Convert to fraction form
    269.98/404.40 = 172.54/x
  3. Step 3: Cross multiply
    269.98x = 404.40 × 172.54
  4. Step 4: Simplify right side
    269.98x = 69,775.18
  5. Step 5: Solve for x
    x = 69,775.18/269.98
  6. Step 6: Final answer
    x = 258.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.