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Finding the Fourth Proportional to 202.18, 303.21 and 57.91

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Solution

The fourth proportional to 202.18, 303.21 and 57.91 is: 86.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.18 : 303.21 = 57.91 : x
  2. Step 2: Convert to fraction form
    202.18/303.21 = 57.91/x
  3. Step 3: Cross multiply
    202.18x = 303.21 × 57.91
  4. Step 4: Simplify right side
    202.18x = 17,558.89
  5. Step 5: Solve for x
    x = 17,558.89/202.18
  6. Step 6: Final answer
    x = 86.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.