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Finding the Fourth Proportional to 626.15, 939.36 and 187.40

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Solution

The fourth proportional to 626.15, 939.36 and 187.40 is: 281.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.15 : 939.36 = 187.40 : x
  2. Step 2: Convert to fraction form
    626.15/939.36 = 187.40/x
  3. Step 3: Cross multiply
    626.15x = 939.36 × 187.40
  4. Step 4: Simplify right side
    626.15x = 176,039.12
  5. Step 5: Solve for x
    x = 176,039.12/626.15
  6. Step 6: Final answer
    x = 281.14

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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.