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Finding the Fourth Proportional to 309.72, 427.77 and 246.91

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Solution

The fourth proportional to 309.72, 427.77 and 246.91 is: 341.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.72 : 427.77 = 246.91 : x
  2. Step 2: Convert to fraction form
    309.72/427.77 = 246.91/x
  3. Step 3: Cross multiply
    309.72x = 427.77 × 246.91
  4. Step 4: Simplify right side
    309.72x = 105,622.15
  5. Step 5: Solve for x
    x = 105,622.15/309.72
  6. Step 6: Final answer
    x = 341.02

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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.