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Finding the Fourth Proportional to 595.44, 820.92 and 398.64

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Solution

The fourth proportional to 595.44, 820.92 and 398.64 is: 549.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    595.44 : 820.92 = 398.64 : x
  2. Step 2: Convert to fraction form
    595.44/820.92 = 398.64/x
  3. Step 3: Cross multiply
    595.44x = 820.92 × 398.64
  4. Step 4: Simplify right side
    595.44x = 327,251.55
  5. Step 5: Solve for x
    x = 327,251.55/595.44
  6. Step 6: Final answer
    x = 549.60

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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.