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Finding the Fourth Proportional to 1,763.66, 2,643.66 and 667.55

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Solution

The fourth proportional to 1,763.66, 2,643.66 and 667.55 is: 1,000.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,763.66 : 2,643.66 = 667.55 : x
  2. Step 2: Convert to fraction form
    1,763.66/2,643.66 = 667.55/x
  3. Step 3: Cross multiply
    1,763.66x = 2,643.66 × 667.55
  4. Step 4: Simplify right side
    1,763.66x = 1,764,762.01
  5. Step 5: Solve for x
    x = 1,764,762.01/1,763.66
  6. Step 6: Final answer
    x = 1,000.63

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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.