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Finding the Fourth Proportional to 2,807.07, 4,211.21 and 859.22

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Solution

The fourth proportional to 2,807.07, 4,211.21 and 859.22 is: 1,289.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,807.07 : 4,211.21 = 859.22 : x
  2. Step 2: Convert to fraction form
    2,807.07/4,211.21 = 859.22/x
  3. Step 3: Cross multiply
    2,807.07x = 4,211.21 × 859.22
  4. Step 4: Simplify right side
    2,807.07x = 3,618,355.86
  5. Step 5: Solve for x
    x = 3,618,355.86/2,807.07
  6. Step 6: Final answer
    x = 1,289.02

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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.