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Finding the Fourth Proportional to 7,428,649.80, 10,419,005.40 and 7,428,649.80

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Solution

The fourth proportional to 7,428,649.80, 10,419,005.40 and 7,428,649.80 is: 10,419,005.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428,649.80 : 10,419,005.40 = 7,428,649.80 : x
  2. Step 2: Convert to fraction form
    7,428,649.80/10,419,005.40 = 7,428,649.80/x
  3. Step 3: Cross multiply
    7,428,649.80x = 10,419,005.40 × 7,428,649.80
  4. Step 4: Simplify right side
    7,428,649.80x = 77,399,142,380,908.92
  5. Step 5: Solve for x
    x = 77,399,142,380,908.92/7,428,649.80
  6. Step 6: Final answer
    x = 10,419,005.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.