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Finding the Fourth Proportional to 330.21, 493.02 and 291.33

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Solution

The fourth proportional to 330.21, 493.02 and 291.33 is: 434.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.21 : 493.02 = 291.33 : x
  2. Step 2: Convert to fraction form
    330.21/493.02 = 291.33/x
  3. Step 3: Cross multiply
    330.21x = 493.02 × 291.33
  4. Step 4: Simplify right side
    330.21x = 143,631.52
  5. Step 5: Solve for x
    x = 143,631.52/330.21
  6. Step 6: Final answer
    x = 434.97

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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.