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Finding the Fourth Proportional to 849.91, 1,273 and 439.45

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Solution

The fourth proportional to 849.91, 1,273 and 439.45 is: 658.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.91 : 1,273 = 439.45 : x
  2. Step 2: Convert to fraction form
    849.91/1,273 = 439.45/x
  3. Step 3: Cross multiply
    849.91x = 1,273 × 439.45
  4. Step 4: Simplify right side
    849.91x = 559,419.85
  5. Step 5: Solve for x
    x = 559,419.85/849.91
  6. Step 6: Final answer
    x = 658.21

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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.