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Finding the Fourth Proportional to 2,375.76, 3,563.76 and 644.40

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Solution

The fourth proportional to 2,375.76, 3,563.76 and 644.40 is: 966.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,375.76 : 3,563.76 = 644.40 : x
  2. Step 2: Convert to fraction form
    2,375.76/3,563.76 = 644.40/x
  3. Step 3: Cross multiply
    2,375.76x = 3,563.76 × 644.40
  4. Step 4: Simplify right side
    2,375.76x = 2,296,486.94
  5. Step 5: Solve for x
    x = 2,296,486.94/2,375.76
  6. Step 6: Final answer
    x = 966.63

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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.