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Finding the Fourth Proportional to 630.22, 941.30 and 491.78

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Solution

The fourth proportional to 630.22, 941.30 and 491.78 is: 734.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.22 : 941.30 = 491.78 : x
  2. Step 2: Convert to fraction form
    630.22/941.30 = 491.78/x
  3. Step 3: Cross multiply
    630.22x = 941.30 × 491.78
  4. Step 4: Simplify right side
    630.22x = 462,912.51
  5. Step 5: Solve for x
    x = 462,912.51/630.22
  6. Step 6: Final answer
    x = 734.53

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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.