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Finding the Fourth Proportional to 615.36, 923.22 and 398.64

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Solution

The fourth proportional to 615.36, 923.22 and 398.64 is: 598.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.36 : 923.22 = 398.64 : x
  2. Step 2: Convert to fraction form
    615.36/923.22 = 398.64/x
  3. Step 3: Cross multiply
    615.36x = 923.22 × 398.64
  4. Step 4: Simplify right side
    615.36x = 368,032.42
  5. Step 5: Solve for x
    x = 368,032.42/615.36
  6. Step 6: Final answer
    x = 598.08

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.