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Finding the Fourth Proportional to 269.70, 405.03 and 188.70

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Solution

The fourth proportional to 269.70, 405.03 and 188.70 is: 283.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.70 : 405.03 = 188.70 : x
  2. Step 2: Convert to fraction form
    269.70/405.03 = 188.70/x
  3. Step 3: Cross multiply
    269.70x = 405.03 × 188.70
  4. Step 4: Simplify right side
    269.70x = 76,429.16
  5. Step 5: Solve for x
    x = 76,429.16/269.70
  6. Step 6: Final answer
    x = 283.39

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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.