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Finding the Fourth Proportional to 844.59, 1,267.17 and 405.99

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Solution

The fourth proportional to 844.59, 1,267.17 and 405.99 is: 609.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.59 : 1,267.17 = 405.99 : x
  2. Step 2: Convert to fraction form
    844.59/1,267.17 = 405.99/x
  3. Step 3: Cross multiply
    844.59x = 1,267.17 × 405.99
  4. Step 4: Simplify right side
    844.59x = 514,458.35
  5. Step 5: Solve for x
    x = 514,458.35/844.59
  6. Step 6: Final answer
    x = 609.12

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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.