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Finding the Fourth Proportional to 1,665.61, 2,498.88 and 495.61

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Solution

The fourth proportional to 1,665.61, 2,498.88 and 495.61 is: 743.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,665.61 : 2,498.88 = 495.61 : x
  2. Step 2: Convert to fraction form
    1,665.61/2,498.88 = 495.61/x
  3. Step 3: Cross multiply
    1,665.61x = 2,498.88 × 495.61
  4. Step 4: Simplify right side
    1,665.61x = 1,238,469.92
  5. Step 5: Solve for x
    x = 1,238,469.92/1,665.61
  6. Step 6: Final answer
    x = 743.55

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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.