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Finding the Fourth Proportional to 1,031.01, 1,546.90 and 620.43

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Solution

The fourth proportional to 1,031.01, 1,546.90 and 620.43 is: 930.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.01 : 1,546.90 = 620.43 : x
  2. Step 2: Convert to fraction form
    1,031.01/1,546.90 = 620.43/x
  3. Step 3: Cross multiply
    1,031.01x = 1,546.90 × 620.43
  4. Step 4: Simplify right side
    1,031.01x = 959,743.17
  5. Step 5: Solve for x
    x = 959,743.17/1,031.01
  6. Step 6: Final answer
    x = 930.88

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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.