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Finding the Fourth Proportional to 854.69, 1,179.78 and 522.99

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Solution

The fourth proportional to 854.69, 1,179.78 and 522.99 is: 721.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.69 : 1,179.78 = 522.99 : x
  2. Step 2: Convert to fraction form
    854.69/1,179.78 = 522.99/x
  3. Step 3: Cross multiply
    854.69x = 1,179.78 × 522.99
  4. Step 4: Simplify right side
    854.69x = 617,013.14
  5. Step 5: Solve for x
    x = 617,013.14/854.69
  6. Step 6: Final answer
    x = 721.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.