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Finding the Fourth Proportional to 2,485.90, 3,728.82 and 637.00

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Solution

The fourth proportional to 2,485.90, 3,728.82 and 637.00 is: 955.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,485.90 : 3,728.82 = 637.00 : x
  2. Step 2: Convert to fraction form
    2,485.90/3,728.82 = 637.00/x
  3. Step 3: Cross multiply
    2,485.90x = 3,728.82 × 637.00
  4. Step 4: Simplify right side
    2,485.90x = 2,375,239.70
  5. Step 5: Solve for x
    x = 2,375,239.70/2,485.90
  6. Step 6: Final answer
    x = 955.49

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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.