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Finding the Fourth Proportional to 615.45, 849.25 and 353.49

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Solution

The fourth proportional to 615.45, 849.25 and 353.49 is: 487.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.45 : 849.25 = 353.49 : x
  2. Step 2: Convert to fraction form
    615.45/849.25 = 353.49/x
  3. Step 3: Cross multiply
    615.45x = 849.25 × 353.49
  4. Step 4: Simplify right side
    615.45x = 300,201.38
  5. Step 5: Solve for x
    x = 300,201.38/615.45
  6. Step 6: Final answer
    x = 487.78

Related Problems

Find fourth proportional to 307.73, 424.63 and 176.75
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Double scale
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Similar ratio
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1.5x scale

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.