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Finding the Fourth Proportional to 620.25, 930.38 and 187.40

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Solution

The fourth proportional to 620.25, 930.38 and 187.40 is: 281.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.25 : 930.38 = 187.40 : x
  2. Step 2: Convert to fraction form
    620.25/930.38 = 187.40/x
  3. Step 3: Cross multiply
    620.25x = 930.38 × 187.40
  4. Step 4: Simplify right side
    620.25x = 174,353.21
  5. Step 5: Solve for x
    x = 174,353.21/620.25
  6. Step 6: Final answer
    x = 281.10

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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.