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Finding the Fourth Proportional to 630.11, 939.22 and 580.91

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Solution

The fourth proportional to 630.11, 939.22 and 580.91 is: 865.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.11 : 939.22 = 580.91 : x
  2. Step 2: Convert to fraction form
    630.11/939.22 = 580.91/x
  3. Step 3: Cross multiply
    630.11x = 939.22 × 580.91
  4. Step 4: Simplify right side
    630.11x = 545,596.14
  5. Step 5: Solve for x
    x = 545,596.14/630.11
  6. Step 6: Final answer
    x = 865.87

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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.