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Finding the Fourth Proportional to 1,247.92, 1,873.60 and 1,003.84

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Solution

The fourth proportional to 1,247.92, 1,873.60 and 1,003.84 is: 1,507.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.92 : 1,873.60 = 1,003.84 : x
  2. Step 2: Convert to fraction form
    1,247.92/1,873.60 = 1,003.84/x
  3. Step 3: Cross multiply
    1,247.92x = 1,873.60 × 1,003.84
  4. Step 4: Simplify right side
    1,247.92x = 1,880,794.62
  5. Step 5: Solve for x
    x = 1,880,794.62/1,247.92
  6. Step 6: Final answer
    x = 1,507.14

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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.