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Finding the Fourth Proportional to 3,272.99, 4,909.43 and 807.86

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Solution

The fourth proportional to 3,272.99, 4,909.43 and 807.86 is: 1,211.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,272.99 : 4,909.43 = 807.86 : x
  2. Step 2: Convert to fraction form
    3,272.99/4,909.43 = 807.86/x
  3. Step 3: Cross multiply
    3,272.99x = 4,909.43 × 807.86
  4. Step 4: Simplify right side
    3,272.99x = 3,966,103.53
  5. Step 5: Solve for x
    x = 3,966,103.53/3,272.99
  6. Step 6: Final answer
    x = 1,211.77

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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.