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Finding the Fourth Proportional to 615.45, 849.23 and 349.91

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Solution

The fourth proportional to 615.45, 849.23 and 349.91 is: 482.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.45 : 849.23 = 349.91 : x
  2. Step 2: Convert to fraction form
    615.45/849.23 = 349.91/x
  3. Step 3: Cross multiply
    615.45x = 849.23 × 349.91
  4. Step 4: Simplify right side
    615.45x = 297,148.07
  5. Step 5: Solve for x
    x = 297,148.07/615.45
  6. Step 6: Final answer
    x = 482.81

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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.