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Finding the Fourth Proportional to 625.44, 939.10 and 490.16

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Solution

The fourth proportional to 625.44, 939.10 and 490.16 is: 735.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.44 : 939.10 = 490.16 : x
  2. Step 2: Convert to fraction form
    625.44/939.10 = 490.16/x
  3. Step 3: Cross multiply
    625.44x = 939.10 × 490.16
  4. Step 4: Simplify right side
    625.44x = 460,309.26
  5. Step 5: Solve for x
    x = 460,309.26/625.44
  6. Step 6: Final answer
    x = 735.98

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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.