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Finding the Fourth Proportional to 422.96, 583.20 and 357.36

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Solution

The fourth proportional to 422.96, 583.20 and 357.36 is: 492.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.96 : 583.20 = 357.36 : x
  2. Step 2: Convert to fraction form
    422.96/583.20 = 357.36/x
  3. Step 3: Cross multiply
    422.96x = 583.20 × 357.36
  4. Step 4: Simplify right side
    422.96x = 208,412.35
  5. Step 5: Solve for x
    x = 208,412.35/422.96
  6. Step 6: Final answer
    x = 492.75

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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.