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Finding the Fourth Proportional to 620, 930.15 and 187.16

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Solution

The fourth proportional to 620, 930.15 and 187.16 is: 280.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    620 : 930.15 = 187.16 : x
  2. Step 2: Convert to fraction form
    620/930.15 = 187.16/x
  3. Step 3: Cross multiply
    620x = 930.15 × 187.16
  4. Step 4: Simplify right side
    620x = 174,086.87
  5. Step 5: Solve for x
    x = 174,086.87/620
  6. Step 6: Final answer
    x = 280.79

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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.