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Finding the Fourth Proportional to 1,659.78, 2,489.10 and 563.89

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Solution

The fourth proportional to 1,659.78, 2,489.10 and 563.89 is: 845.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,659.78 : 2,489.10 = 563.89 : x
  2. Step 2: Convert to fraction form
    1,659.78/2,489.10 = 563.89/x
  3. Step 3: Cross multiply
    1,659.78x = 2,489.10 × 563.89
  4. Step 4: Simplify right side
    1,659.78x = 1,403,578.60
  5. Step 5: Solve for x
    x = 1,403,578.60/1,659.78
  6. Step 6: Final answer
    x = 845.64

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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.