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Finding the Fourth Proportional to 615.38, 849.12 and 353.35

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Solution

The fourth proportional to 615.38, 849.12 and 353.35 is: 487.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.38 : 849.12 = 353.35 : x
  2. Step 2: Convert to fraction form
    615.38/849.12 = 353.35/x
  3. Step 3: Cross multiply
    615.38x = 849.12 × 353.35
  4. Step 4: Simplify right side
    615.38x = 300,036.55
  5. Step 5: Solve for x
    x = 300,036.55/615.38
  6. Step 6: Final answer
    x = 487.56

Related Problems

Find fourth proportional to 307.69, 424.56 and 176.68
Half scale
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Double scale
Find fourth proportional to 616.38, 850.50 and 354.35
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.