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Finding the Fourth Proportional to 427.96, 590.70 and 253.42

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Solution

The fourth proportional to 427.96, 590.70 and 253.42 is: 349.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.96 : 590.70 = 253.42 : x
  2. Step 2: Convert to fraction form
    427.96/590.70 = 253.42/x
  3. Step 3: Cross multiply
    427.96x = 590.70 × 253.42
  4. Step 4: Simplify right side
    427.96x = 149,695.19
  5. Step 5: Solve for x
    x = 149,695.19/427.96
  6. Step 6: Final answer
    x = 349.79

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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.