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Finding the Fourth Proportional to 594.49, 820.11 and 398.08

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Solution

The fourth proportional to 594.49, 820.11 and 398.08 is: 549.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    594.49 : 820.11 = 398.08 : x
  2. Step 2: Convert to fraction form
    594.49/820.11 = 398.08/x
  3. Step 3: Cross multiply
    594.49x = 820.11 × 398.08
  4. Step 4: Simplify right side
    594.49x = 326,469.39
  5. Step 5: Solve for x
    x = 326,469.39/594.49
  6. Step 6: Final answer
    x = 549.16

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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.