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Finding the Fourth Proportional to 1,559.74, 2,151.96 and 969.64

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Solution

The fourth proportional to 1,559.74, 2,151.96 and 969.64 is: 1,337.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,559.74 : 2,151.96 = 969.64 : x
  2. Step 2: Convert to fraction form
    1,559.74/2,151.96 = 969.64/x
  3. Step 3: Cross multiply
    1,559.74x = 2,151.96 × 969.64
  4. Step 4: Simplify right side
    1,559.74x = 2,086,626.49
  5. Step 5: Solve for x
    x = 2,086,626.49/1,559.74
  6. Step 6: Final answer
    x = 1,337.80

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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.