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Finding the Fourth Proportional to 313.52, 431.63 and 247.01

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Solution

The fourth proportional to 313.52, 431.63 and 247.01 is: 340.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.52 : 431.63 = 247.01 : x
  2. Step 2: Convert to fraction form
    313.52/431.63 = 247.01/x
  3. Step 3: Cross multiply
    313.52x = 431.63 × 247.01
  4. Step 4: Simplify right side
    313.52x = 106,613.53
  5. Step 5: Solve for x
    x = 106,613.53/313.52
  6. Step 6: Final answer
    x = 340.06

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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.