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Finding the Fourth Proportional to 7,335,288.40, 10,978,049.40 and 6,439,493.20

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Solution

The fourth proportional to 7,335,288.40, 10,978,049.40 and 6,439,493.20 is: 9,637,395.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,335,288.40 : 10,978,049.40 = 6,439,493.20 : x
  2. Step 2: Convert to fraction form
    7,335,288.40/10,978,049.40 = 6,439,493.20/x
  3. Step 3: Cross multiply
    7,335,288.40x = 10,978,049.40 × 6,439,493.20
  4. Step 4: Simplify right side
    7,335,288.40x = 70,693,074,460,564.08
  5. Step 5: Solve for x
    x = 70,693,074,460,564.08/7,335,288.40
  6. Step 6: Final answer
    x = 9,637,395.37

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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.