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Finding the Fourth Proportional to 615.72, 849.68 and 353.72

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Solution

The fourth proportional to 615.72, 849.68 and 353.72 is: 488.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.72 : 849.68 = 353.72 : x
  2. Step 2: Convert to fraction form
    615.72/849.68 = 353.72/x
  3. Step 3: Cross multiply
    615.72x = 849.68 × 353.72
  4. Step 4: Simplify right side
    615.72x = 300,548.81
  5. Step 5: Solve for x
    x = 300,548.81/615.72
  6. Step 6: Final answer
    x = 488.13

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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.