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Finding the Fourth Proportional to 312.21, 430.11 and 250.02

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Solution

The fourth proportional to 312.21, 430.11 and 250.02 is: 344.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.21 : 430.11 = 250.02 : x
  2. Step 2: Convert to fraction form
    312.21/430.11 = 250.02/x
  3. Step 3: Cross multiply
    312.21x = 430.11 × 250.02
  4. Step 4: Simplify right side
    312.21x = 107,536.10
  5. Step 5: Solve for x
    x = 107,536.10/312.21
  6. Step 6: Final answer
    x = 344.44

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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.