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Finding the Fourth Proportional to 620.53, 930.79 and 187.69

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Solution

The fourth proportional to 620.53, 930.79 and 187.69 is: 281.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.53 : 930.79 = 187.69 : x
  2. Step 2: Convert to fraction form
    620.53/930.79 = 187.69/x
  3. Step 3: Cross multiply
    620.53x = 930.79 × 187.69
  4. Step 4: Simplify right side
    620.53x = 174,699.98
  5. Step 5: Solve for x
    x = 174,699.98/620.53
  6. Step 6: Final answer
    x = 281.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.