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Finding the Fourth Proportional to 331.52, 493.84 and 313.28

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Solution

The fourth proportional to 331.52, 493.84 and 313.28 is: 466.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.52 : 493.84 = 313.28 : x
  2. Step 2: Convert to fraction form
    331.52/493.84 = 313.28/x
  3. Step 3: Cross multiply
    331.52x = 493.84 × 313.28
  4. Step 4: Simplify right side
    331.52x = 154,710.20
  5. Step 5: Solve for x
    x = 154,710.20/331.52
  6. Step 6: Final answer
    x = 466.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.