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Finding the Fourth Proportional to 1,631.72, 2,251.70 and 923.60

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Solution

The fourth proportional to 1,631.72, 2,251.70 and 923.60 is: 1,274.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.72 : 2,251.70 = 923.60 : x
  2. Step 2: Convert to fraction form
    1,631.72/2,251.70 = 923.60/x
  3. Step 3: Cross multiply
    1,631.72x = 2,251.70 × 923.60
  4. Step 4: Simplify right side
    1,631.72x = 2,079,670.12
  5. Step 5: Solve for x
    x = 2,079,670.12/1,631.72
  6. Step 6: Final answer
    x = 1,274.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.