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Finding the Fourth Proportional to 1,003.62, 1,504.28 and 628.55

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Solution

The fourth proportional to 1,003.62, 1,504.28 and 628.55 is: 942.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.62 : 1,504.28 = 628.55 : x
  2. Step 2: Convert to fraction form
    1,003.62/1,504.28 = 628.55/x
  3. Step 3: Cross multiply
    1,003.62x = 1,504.28 × 628.55
  4. Step 4: Simplify right side
    1,003.62x = 945,507.67
  5. Step 5: Solve for x
    x = 945,507.67/1,003.62
  6. Step 6: Final answer
    x = 942.10

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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.