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Finding the Fourth Proportional to 1,245.04, 1,866.91 and 660.37

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Solution

The fourth proportional to 1,245.04, 1,866.91 and 660.37 is: 990.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.04 : 1,866.91 = 660.37 : x
  2. Step 2: Convert to fraction form
    1,245.04/1,866.91 = 660.37/x
  3. Step 3: Cross multiply
    1,245.04x = 1,866.91 × 660.37
  4. Step 4: Simplify right side
    1,245.04x = 1,232,845.04
  5. Step 5: Solve for x
    x = 1,232,845.04/1,245.04
  6. Step 6: Final answer
    x = 990.21

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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.