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Finding the Fourth Proportional to 1,563.76, 2,158.14 and 1,039.96

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Solution

The fourth proportional to 1,563.76, 2,158.14 and 1,039.96 is: 1,435.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.76 : 2,158.14 = 1,039.96 : x
  2. Step 2: Convert to fraction form
    1,563.76/2,158.14 = 1,039.96/x
  3. Step 3: Cross multiply
    1,563.76x = 2,158.14 × 1,039.96
  4. Step 4: Simplify right side
    1,563.76x = 2,244,379.27
  5. Step 5: Solve for x
    x = 2,244,379.27/1,563.76
  6. Step 6: Final answer
    x = 1,435.25

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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.