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Finding the Fourth Proportional to 1,769.91, 2,656.25 and 1,225.91

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Solution

The fourth proportional to 1,769.91, 2,656.25 and 1,225.91 is: 1,839.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,769.91 : 2,656.25 = 1,225.91 : x
  2. Step 2: Convert to fraction form
    1,769.91/2,656.25 = 1,225.91/x
  3. Step 3: Cross multiply
    1,769.91x = 2,656.25 × 1,225.91
  4. Step 4: Simplify right side
    1,769.91x = 3,256,323.44
  5. Step 5: Solve for x
    x = 3,256,323.44/1,769.91
  6. Step 6: Final answer
    x = 1,839.82

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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.