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Finding the Fourth Proportional to 615.38, 848.44 and 393.96

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Solution

The fourth proportional to 615.38, 848.44 and 393.96 is: 543.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.38 : 848.44 = 393.96 : x
  2. Step 2: Convert to fraction form
    615.38/848.44 = 393.96/x
  3. Step 3: Cross multiply
    615.38x = 848.44 × 393.96
  4. Step 4: Simplify right side
    615.38x = 334,251.42
  5. Step 5: Solve for x
    x = 334,251.42/615.38
  6. Step 6: Final answer
    x = 543.16

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Double scale
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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.