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Finding the Fourth Proportional to 269.83, 404.68 and 87.13

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Solution

The fourth proportional to 269.83, 404.68 and 87.13 is: 130.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.83 : 404.68 = 87.13 : x
  2. Step 2: Convert to fraction form
    269.83/404.68 = 87.13/x
  3. Step 3: Cross multiply
    269.83x = 404.68 × 87.13
  4. Step 4: Simplify right side
    269.83x = 35,259.77
  5. Step 5: Solve for x
    x = 35,259.77/269.83
  6. Step 6: Final answer
    x = 130.67

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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.