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Finding the Fourth Proportional to 594.60, 820.68 and 398.30

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Solution

The fourth proportional to 594.60, 820.68 and 398.30 is: 549.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    594.60 : 820.68 = 398.30 : x
  2. Step 2: Convert to fraction form
    594.60/820.68 = 398.30/x
  3. Step 3: Cross multiply
    594.60x = 820.68 × 398.30
  4. Step 4: Simplify right side
    594.60x = 326,876.84
  5. Step 5: Solve for x
    x = 326,876.84/594.60
  6. Step 6: Final answer
    x = 549.74

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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.