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Finding the Fourth Proportional to 923.62, 1,273.74 and 688.15

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Solution

The fourth proportional to 923.62, 1,273.74 and 688.15 is: 949.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.62 : 1,273.74 = 688.15 : x
  2. Step 2: Convert to fraction form
    923.62/1,273.74 = 688.15/x
  3. Step 3: Cross multiply
    923.62x = 1,273.74 × 688.15
  4. Step 4: Simplify right side
    923.62x = 876,517.81
  5. Step 5: Solve for x
    x = 876,517.81/923.62
  6. Step 6: Final answer
    x = 949.00

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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.