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Finding the Fourth Proportional to 631.04, 945.28 and 439.04

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Solution

The fourth proportional to 631.04, 945.28 and 439.04 is: 657.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.04 : 945.28 = 439.04 : x
  2. Step 2: Convert to fraction form
    631.04/945.28 = 439.04/x
  3. Step 3: Cross multiply
    631.04x = 945.28 × 439.04
  4. Step 4: Simplify right side
    631.04x = 415,015.73
  5. Step 5: Solve for x
    x = 415,015.73/631.04
  6. Step 6: Final answer
    x = 657.67

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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.