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Finding the Fourth Proportional to 631.01, 945.20 and 321.93

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Solution

The fourth proportional to 631.01, 945.20 and 321.93 is: 482.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.01 : 945.20 = 321.93 : x
  2. Step 2: Convert to fraction form
    631.01/945.20 = 321.93/x
  3. Step 3: Cross multiply
    631.01x = 945.20 × 321.93
  4. Step 4: Simplify right side
    631.01x = 304,289.04
  5. Step 5: Solve for x
    x = 304,289.04/631.01
  6. Step 6: Final answer
    x = 482.22

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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.