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Finding the Fourth Proportional to 1,772.89, 2,659.63 and 540.21

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Solution

The fourth proportional to 1,772.89, 2,659.63 and 540.21 is: 810.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.89 : 2,659.63 = 540.21 : x
  2. Step 2: Convert to fraction form
    1,772.89/2,659.63 = 540.21/x
  3. Step 3: Cross multiply
    1,772.89x = 2,659.63 × 540.21
  4. Step 4: Simplify right side
    1,772.89x = 1,436,758.72
  5. Step 5: Solve for x
    x = 1,436,758.72/1,772.89
  6. Step 6: Final answer
    x = 810.40

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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.