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Finding the Fourth Proportional to 422.79, 583.61 and 248.28

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Solution

The fourth proportional to 422.79, 583.61 and 248.28 is: 342.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.79 : 583.61 = 248.28 : x
  2. Step 2: Convert to fraction form
    422.79/583.61 = 248.28/x
  3. Step 3: Cross multiply
    422.79x = 583.61 × 248.28
  4. Step 4: Simplify right side
    422.79x = 144,897.45
  5. Step 5: Solve for x
    x = 144,897.45/422.79
  6. Step 6: Final answer
    x = 342.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.