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Finding the Fourth Proportional to 1,629.64, 2,445.10 and 717

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Solution

The fourth proportional to 1,629.64, 2,445.10 and 717 is: 1,075.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.64 : 2,445.10 = 717 : x
  2. Step 2: Convert to fraction form
    1,629.64/2,445.10 = 717/x
  3. Step 3: Cross multiply
    1,629.64x = 2,445.10 × 717
  4. Step 4: Simplify right side
    1,629.64x = 1,753,136.70
  5. Step 5: Solve for x
    x = 1,753,136.70/1,629.64
  6. Step 6: Final answer
    x = 1,075.78

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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.