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Finding the Fourth Proportional to 330.76, 493.73 and 289.75

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Solution

The fourth proportional to 330.76, 493.73 and 289.75 is: 432.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.76 : 493.73 = 289.75 : x
  2. Step 2: Convert to fraction form
    330.76/493.73 = 289.75/x
  3. Step 3: Cross multiply
    330.76x = 493.73 × 289.75
  4. Step 4: Simplify right side
    330.76x = 143,058.27
  5. Step 5: Solve for x
    x = 143,058.27/330.76
  6. Step 6: Final answer
    x = 432.51

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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.