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Finding the Fourth Proportional to 442.32, 610.08 and 398.64

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Solution

The fourth proportional to 442.32, 610.08 and 398.64 is: 549.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.32 : 610.08 = 398.64 : x
  2. Step 2: Convert to fraction form
    442.32/610.08 = 398.64/x
  3. Step 3: Cross multiply
    442.32x = 610.08 × 398.64
  4. Step 4: Simplify right side
    442.32x = 243,202.29
  5. Step 5: Solve for x
    x = 243,202.29/442.32
  6. Step 6: Final answer
    x = 549.83

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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.