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Finding the Fourth Proportional to 1,244.63, 1,868.08 and 660.07

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Solution

The fourth proportional to 1,244.63, 1,868.08 and 660.07 is: 990.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.63 : 1,868.08 = 660.07 : x
  2. Step 2: Convert to fraction form
    1,244.63/1,868.08 = 660.07/x
  3. Step 3: Cross multiply
    1,244.63x = 1,868.08 × 660.07
  4. Step 4: Simplify right side
    1,244.63x = 1,233,054.98
  5. Step 5: Solve for x
    x = 1,233,054.98/1,244.63
  6. Step 6: Final answer
    x = 990.70

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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.