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Finding the Fourth Proportional to 398.84, 597.46 and 311.74

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Solution

The fourth proportional to 398.84, 597.46 and 311.74 is: 466.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.84 : 597.46 = 311.74 : x
  2. Step 2: Convert to fraction form
    398.84/597.46 = 311.74/x
  3. Step 3: Cross multiply
    398.84x = 597.46 × 311.74
  4. Step 4: Simplify right side
    398.84x = 186,250.49
  5. Step 5: Solve for x
    x = 186,250.49/398.84
  6. Step 6: Final answer
    x = 466.98

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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.