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Finding the Fourth Proportional to 1,245.46, 1,868.04 and 660.23

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Solution

The fourth proportional to 1,245.46, 1,868.04 and 660.23 is: 990.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.46 : 1,868.04 = 660.23 : x
  2. Step 2: Convert to fraction form
    1,245.46/1,868.04 = 660.23/x
  3. Step 3: Cross multiply
    1,245.46x = 1,868.04 × 660.23
  4. Step 4: Simplify right side
    1,245.46x = 1,233,336.05
  5. Step 5: Solve for x
    x = 1,233,336.05/1,245.46
  6. Step 6: Final answer
    x = 990.27

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1.5x scale

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.