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Finding the Fourth Proportional to 285.22, 393.51 and 202.37

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Solution

The fourth proportional to 285.22, 393.51 and 202.37 is: 279.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.22 : 393.51 = 202.37 : x
  2. Step 2: Convert to fraction form
    285.22/393.51 = 202.37/x
  3. Step 3: Cross multiply
    285.22x = 393.51 × 202.37
  4. Step 4: Simplify right side
    285.22x = 79,635.59
  5. Step 5: Solve for x
    x = 79,635.59/285.22
  6. Step 6: Final answer
    x = 279.21

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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.