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Finding the Fourth Proportional to 313.39, 432.21 and 220.06

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Solution

The fourth proportional to 313.39, 432.21 and 220.06 is: 303.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.39 : 432.21 = 220.06 : x
  2. Step 2: Convert to fraction form
    313.39/432.21 = 220.06/x
  3. Step 3: Cross multiply
    313.39x = 432.21 × 220.06
  4. Step 4: Simplify right side
    313.39x = 95,112.13
  5. Step 5: Solve for x
    x = 95,112.13/313.39
  6. Step 6: Final answer
    x = 303.49

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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.