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Finding the Fourth Proportional to 6,388,355.40, 8,819,909.82 and 4,066,558.44

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Solution

The fourth proportional to 6,388,355.40, 8,819,909.82 and 4,066,558.44 is: 5,614,383.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,388,355.40 : 8,819,909.82 = 4,066,558.44 : x
  2. Step 2: Convert to fraction form
    6,388,355.40/8,819,909.82 = 4,066,558.44/x
  3. Step 3: Cross multiply
    6,388,355.40x = 8,819,909.82 × 4,066,558.44
  4. Step 4: Simplify right side
    6,388,355.40x = 35,866,678,718,559.88
  5. Step 5: Solve for x
    x = 35,866,678,718,559.88/6,388,355.40
  6. Step 6: Final answer
    x = 5,614,383.75

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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.