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Finding the Fourth Proportional to 630.38, 939.94 and 619.46

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Solution

The fourth proportional to 630.38, 939.94 and 619.46 is: 923.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.38 : 939.94 = 619.46 : x
  2. Step 2: Convert to fraction form
    630.38/939.94 = 619.46/x
  3. Step 3: Cross multiply
    630.38x = 939.94 × 619.46
  4. Step 4: Simplify right side
    630.38x = 582,255.23
  5. Step 5: Solve for x
    x = 582,255.23/630.38
  6. Step 6: Final answer
    x = 923.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.