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Finding the Fourth Proportional to 620.24, 930.54 and 187.40

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Solution

The fourth proportional to 620.24, 930.54 and 187.40 is: 281.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.24 : 930.54 = 187.40 : x
  2. Step 2: Convert to fraction form
    620.24/930.54 = 187.40/x
  3. Step 3: Cross multiply
    620.24x = 930.54 × 187.40
  4. Step 4: Simplify right side
    620.24x = 174,382.26
  5. Step 5: Solve for x
    x = 174,382.26/620.24
  6. Step 6: Final answer
    x = 281.15

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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.