Home / 1,490.09-2,234.80-668.60

Finding the Fourth Proportional to 1,490.09, 2,234.80 and 668.60

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Solution

The fourth proportional to 1,490.09, 2,234.80 and 668.60 is: 1,002.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.09 : 2,234.80 = 668.60 : x
  2. Step 2: Convert to fraction form
    1,490.09/2,234.80 = 668.60/x
  3. Step 3: Cross multiply
    1,490.09x = 2,234.80 × 668.60
  4. Step 4: Simplify right side
    1,490.09x = 1,494,189.73
  5. Step 5: Solve for x
    x = 1,494,189.73/1,490.09
  6. Step 6: Final answer
    x = 1,002.75

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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.