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Finding the Fourth Proportional to 631.81, 948.59 and 323.87

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Solution

The fourth proportional to 631.81, 948.59 and 323.87 is: 486.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.81 : 948.59 = 323.87 : x
  2. Step 2: Convert to fraction form
    631.81/948.59 = 323.87/x
  3. Step 3: Cross multiply
    631.81x = 948.59 × 323.87
  4. Step 4: Simplify right side
    631.81x = 307,219.84
  5. Step 5: Solve for x
    x = 307,219.84/631.81
  6. Step 6: Final answer
    x = 486.25

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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.