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Finding the Fourth Proportional to 631.17, 947.15 and 306.36

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Solution

The fourth proportional to 631.17, 947.15 and 306.36 is: 459.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.17 : 947.15 = 306.36 : x
  2. Step 2: Convert to fraction form
    631.17/947.15 = 306.36/x
  3. Step 3: Cross multiply
    631.17x = 947.15 × 306.36
  4. Step 4: Simplify right side
    631.17x = 290,166.22
  5. Step 5: Solve for x
    x = 290,166.22/631.17
  6. Step 6: Final answer
    x = 459.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.