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Finding the Fourth Proportional to 2,490.63, 3,735.95 and 641.75

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Solution

The fourth proportional to 2,490.63, 3,735.95 and 641.75 is: 962.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.63 : 3,735.95 = 641.75 : x
  2. Step 2: Convert to fraction form
    2,490.63/3,735.95 = 641.75/x
  3. Step 3: Cross multiply
    2,490.63x = 3,735.95 × 641.75
  4. Step 4: Simplify right side
    2,490.63x = 2,397,545.91
  5. Step 5: Solve for x
    x = 2,397,545.91/2,490.63
  6. Step 6: Final answer
    x = 962.63

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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.