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Finding the Fourth Proportional to 6,909.00, 10,363.45 and 1,978.66

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Solution

The fourth proportional to 6,909.00, 10,363.45 and 1,978.66 is: 2,967.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,909.00 : 10,363.45 = 1,978.66 : x
  2. Step 2: Convert to fraction form
    6,909.00/10,363.45 = 1,978.66/x
  3. Step 3: Cross multiply
    6,909.00x = 10,363.45 × 1,978.66
  4. Step 4: Simplify right side
    6,909.00x = 20,505,699.58
  5. Step 5: Solve for x
    x = 20,505,699.58/6,909.00
  6. Step 6: Final answer
    x = 2,967.97

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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.