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Finding the Fourth Proportional to 312.26, 430.65 and 265.68

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Solution

The fourth proportional to 312.26, 430.65 and 265.68 is: 366.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.26 : 430.65 = 265.68 : x
  2. Step 2: Convert to fraction form
    312.26/430.65 = 265.68/x
  3. Step 3: Cross multiply
    312.26x = 430.65 × 265.68
  4. Step 4: Simplify right side
    312.26x = 114,415.09
  5. Step 5: Solve for x
    x = 114,415.09/312.26
  6. Step 6: Final answer
    x = 366.42

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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.