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Finding the Fourth Proportional to 3,046.50, 4,569.21 and 855.42

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Solution

The fourth proportional to 3,046.50, 4,569.21 and 855.42 is: 1,282.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,046.50 : 4,569.21 = 855.42 : x
  2. Step 2: Convert to fraction form
    3,046.50/4,569.21 = 855.42/x
  3. Step 3: Cross multiply
    3,046.50x = 4,569.21 × 855.42
  4. Step 4: Simplify right side
    3,046.50x = 3,908,593.62
  5. Step 5: Solve for x
    x = 3,908,593.62/3,046.50
  6. Step 6: Final answer
    x = 1,282.98

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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.