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Finding the Fourth Proportional to 322.32, 483.84 and 279.84

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Solution

The fourth proportional to 322.32, 483.84 and 279.84 is: 420.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.32 : 483.84 = 279.84 : x
  2. Step 2: Convert to fraction form
    322.32/483.84 = 279.84/x
  3. Step 3: Cross multiply
    322.32x = 483.84 × 279.84
  4. Step 4: Simplify right side
    322.32x = 135,397.79
  5. Step 5: Solve for x
    x = 135,397.79/322.32
  6. Step 6: Final answer
    x = 420.07

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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.