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Finding the Fourth Proportional to 2,686.56, 4,034.64 and 1,764

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Solution

The fourth proportional to 2,686.56, 4,034.64 and 1,764 is: 2,649.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.56 : 4,034.64 = 1,764 : x
  2. Step 2: Convert to fraction form
    2,686.56/4,034.64 = 1,764/x
  3. Step 3: Cross multiply
    2,686.56x = 4,034.64 × 1,764
  4. Step 4: Simplify right side
    2,686.56x = 7,117,104.96
  5. Step 5: Solve for x
    x = 7,117,104.96/2,686.56
  6. Step 6: Final answer
    x = 2,649.15

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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.