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Finding the Fourth Proportional to 630.88, 942.06 and 515.54

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Solution

The fourth proportional to 630.88, 942.06 and 515.54 is: 769.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.88 : 942.06 = 515.54 : x
  2. Step 2: Convert to fraction form
    630.88/942.06 = 515.54/x
  3. Step 3: Cross multiply
    630.88x = 942.06 × 515.54
  4. Step 4: Simplify right side
    630.88x = 485,669.61
  5. Step 5: Solve for x
    x = 485,669.61/630.88
  6. Step 6: Final answer
    x = 769.83

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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.