Home / 1,491.18-2,237.38-668.90

Finding the Fourth Proportional to 1,491.18, 2,237.38 and 668.90

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Solution

The fourth proportional to 1,491.18, 2,237.38 and 668.90 is: 1,003.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.18 : 2,237.38 = 668.90 : x
  2. Step 2: Convert to fraction form
    1,491.18/2,237.38 = 668.90/x
  3. Step 3: Cross multiply
    1,491.18x = 2,237.38 × 668.90
  4. Step 4: Simplify right side
    1,491.18x = 1,496,583.48
  5. Step 5: Solve for x
    x = 1,496,583.48/1,491.18
  6. Step 6: Final answer
    x = 1,003.62

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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.