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Finding the Fourth Proportional to 322.79, 482.03 and 281.75

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Solution

The fourth proportional to 322.79, 482.03 and 281.75 is: 420.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.79 : 482.03 = 281.75 : x
  2. Step 2: Convert to fraction form
    322.79/482.03 = 281.75/x
  3. Step 3: Cross multiply
    322.79x = 482.03 × 281.75
  4. Step 4: Simplify right side
    322.79x = 135,809.19
  5. Step 5: Solve for x
    x = 135,809.19/322.79
  6. Step 6: Final answer
    x = 420.74

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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.