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Finding the Fourth Proportional to 7,335,286.40, 10,978,046.40 and 6,439,491.20

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Solution

The fourth proportional to 7,335,286.40, 10,978,046.40 and 6,439,491.20 is: 9,637,392.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,335,286.40 : 10,978,046.40 = 6,439,491.20 : x
  2. Step 2: Convert to fraction form
    7,335,286.40/10,978,046.40 = 6,439,491.20/x
  3. Step 3: Cross multiply
    7,335,286.40x = 10,978,046.40 × 6,439,491.20
  4. Step 4: Simplify right side
    7,335,286.40x = 70,693,033,185,991.69
  5. Step 5: Solve for x
    x = 70,693,033,185,991.69/7,335,286.40
  6. Step 6: Final answer
    x = 9,637,392.37

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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.