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Finding the Fourth Proportional to 3,774.78, 5,660.10 and 1,309.38

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Solution

The fourth proportional to 3,774.78, 5,660.10 and 1,309.38 is: 1,963.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,774.78 : 5,660.10 = 1,309.38 : x
  2. Step 2: Convert to fraction form
    3,774.78/5,660.10 = 1,309.38/x
  3. Step 3: Cross multiply
    3,774.78x = 5,660.10 × 1,309.38
  4. Step 4: Simplify right side
    3,774.78x = 7,411,221.74
  5. Step 5: Solve for x
    x = 7,411,221.74/3,774.78
  6. Step 6: Final answer
    x = 1,963.35

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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.