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Finding the Fourth Proportional to 6,321,487.72, 8,723,653.08 and 3,420,878.64

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Solution

The fourth proportional to 6,321,487.72, 8,723,653.08 and 3,420,878.64 is: 4,720,812.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,321,487.72 : 8,723,653.08 = 3,420,878.64 : x
  2. Step 2: Convert to fraction form
    6,321,487.72/8,723,653.08 = 3,420,878.64/x
  3. Step 3: Cross multiply
    6,321,487.72x = 8,723,653.08 × 3,420,878.64
  4. Step 4: Simplify right side
    6,321,487.72x = 29,842,558,484,142.21
  5. Step 5: Solve for x
    x = 29,842,558,484,142.21/6,321,487.72
  6. Step 6: Final answer
    x = 4,720,812.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.