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Finding the Fourth Proportional to 630.62, 940.38 and 616.68

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Solution

The fourth proportional to 630.62, 940.38 and 616.68 is: 919.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.62 : 940.38 = 616.68 : x
  2. Step 2: Convert to fraction form
    630.62/940.38 = 616.68/x
  3. Step 3: Cross multiply
    630.62x = 940.38 × 616.68
  4. Step 4: Simplify right side
    630.62x = 579,913.54
  5. Step 5: Solve for x
    x = 579,913.54/630.62
  6. Step 6: Final answer
    x = 919.59

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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.