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Finding the Fourth Proportional to 854.87, 1,282.35 and 269.89

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Solution

The fourth proportional to 854.87, 1,282.35 and 269.89 is: 404.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.87 : 1,282.35 = 269.89 : x
  2. Step 2: Convert to fraction form
    854.87/1,282.35 = 269.89/x
  3. Step 3: Cross multiply
    854.87x = 1,282.35 × 269.89
  4. Step 4: Simplify right side
    854.87x = 346,088.63
  5. Step 5: Solve for x
    x = 346,088.63/854.87
  6. Step 6: Final answer
    x = 404.85

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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.