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Finding the Fourth Proportional to 669.03, 1,003.54 and 439.37

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Solution

The fourth proportional to 669.03, 1,003.54 and 439.37 is: 659.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.03 : 1,003.54 = 439.37 : x
  2. Step 2: Convert to fraction form
    669.03/1,003.54 = 439.37/x
  3. Step 3: Cross multiply
    669.03x = 1,003.54 × 439.37
  4. Step 4: Simplify right side
    669.03x = 440,925.37
  5. Step 5: Solve for x
    x = 440,925.37/669.03
  6. Step 6: Final answer
    x = 659.06

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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.