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Finding the Fourth Proportional to 313.32, 431.24 and 266.60

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Solution

The fourth proportional to 313.32, 431.24 and 266.60 is: 366.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.32 : 431.24 = 266.60 : x
  2. Step 2: Convert to fraction form
    313.32/431.24 = 266.60/x
  3. Step 3: Cross multiply
    313.32x = 431.24 × 266.60
  4. Step 4: Simplify right side
    313.32x = 114,968.58
  5. Step 5: Solve for x
    x = 114,968.58/313.32
  6. Step 6: Final answer
    x = 366.94

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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.