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Finding the Fourth Proportional to 5,196.66, 7,798.41 and 1,909.79

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Solution

The fourth proportional to 5,196.66, 7,798.41 and 1,909.79 is: 2,865.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,196.66 : 7,798.41 = 1,909.79 : x
  2. Step 2: Convert to fraction form
    5,196.66/7,798.41 = 1,909.79/x
  3. Step 3: Cross multiply
    5,196.66x = 7,798.41 × 1,909.79
  4. Step 4: Simplify right side
    5,196.66x = 14,893,325.43
  5. Step 5: Solve for x
    x = 14,893,325.43/5,196.66
  6. Step 6: Final answer
    x = 2,865.94

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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.