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Finding the Fourth Proportional to 313.11, 469.73 and 118.17

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Solution

The fourth proportional to 313.11, 469.73 and 118.17 is: 177.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.11 : 469.73 = 118.17 : x
  2. Step 2: Convert to fraction form
    313.11/469.73 = 118.17/x
  3. Step 3: Cross multiply
    313.11x = 469.73 × 118.17
  4. Step 4: Simplify right side
    313.11x = 55,507.99
  5. Step 5: Solve for x
    x = 55,507.99/313.11
  6. Step 6: Final answer
    x = 177.28

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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.