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Finding the Fourth Proportional to 2,709.25, 4,064.10 and 761.47

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Solution

The fourth proportional to 2,709.25, 4,064.10 and 761.47 is: 1,142.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,709.25 : 4,064.10 = 761.47 : x
  2. Step 2: Convert to fraction form
    2,709.25/4,064.10 = 761.47/x
  3. Step 3: Cross multiply
    2,709.25x = 4,064.10 × 761.47
  4. Step 4: Simplify right side
    2,709.25x = 3,094,690.23
  5. Step 5: Solve for x
    x = 3,094,690.23/2,709.25
  6. Step 6: Final answer
    x = 1,142.27

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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.