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Finding the Fourth Proportional to 615.12, 848.96 and 353.12

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Solution

The fourth proportional to 615.12, 848.96 and 353.12 is: 487.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.12 : 848.96 = 353.12 : x
  2. Step 2: Convert to fraction form
    615.12/848.96 = 353.12/x
  3. Step 3: Cross multiply
    615.12x = 848.96 × 353.12
  4. Step 4: Simplify right side
    615.12x = 299,784.76
  5. Step 5: Solve for x
    x = 299,784.76/615.12
  6. Step 6: Final answer
    x = 487.36

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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.