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Finding the Fourth Proportional to 313.13, 469.16 and 221.68

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Solution

The fourth proportional to 313.13, 469.16 and 221.68 is: 332.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.13 : 469.16 = 221.68 : x
  2. Step 2: Convert to fraction form
    313.13/469.16 = 221.68/x
  3. Step 3: Cross multiply
    313.13x = 469.16 × 221.68
  4. Step 4: Simplify right side
    313.13x = 104,003.39
  5. Step 5: Solve for x
    x = 104,003.39/313.13
  6. Step 6: Final answer
    x = 332.14

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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.