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Finding the Fourth Proportional to 1,773.10, 2,440.43 and 1,561.90

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Solution

The fourth proportional to 1,773.10, 2,440.43 and 1,561.90 is: 2,149.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,773.10 : 2,440.43 = 1,561.90 : x
  2. Step 2: Convert to fraction form
    1,773.10/2,440.43 = 1,561.90/x
  3. Step 3: Cross multiply
    1,773.10x = 2,440.43 × 1,561.90
  4. Step 4: Simplify right side
    1,773.10x = 3,811,707.62
  5. Step 5: Solve for x
    x = 3,811,707.62/1,773.10
  6. Step 6: Final answer
    x = 2,149.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.