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Finding the Fourth Proportional to 1,660.61, 2,490.89 and 506.36

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Solution

The fourth proportional to 1,660.61, 2,490.89 and 506.36 is: 759.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.61 : 2,490.89 = 506.36 : x
  2. Step 2: Convert to fraction form
    1,660.61/2,490.89 = 506.36/x
  3. Step 3: Cross multiply
    1,660.61x = 2,490.89 × 506.36
  4. Step 4: Simplify right side
    1,660.61x = 1,261,287.06
  5. Step 5: Solve for x
    x = 1,261,287.06/1,660.61
  6. Step 6: Final answer
    x = 759.53

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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.