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Finding the Fourth Proportional to 7,318,610.69, 10,978,455.29 and 1,927,223.75

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Solution

The fourth proportional to 7,318,610.69, 10,978,455.29 and 1,927,223.75 is: 2,890,977.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,318,610.69 : 10,978,455.29 = 1,927,223.75 : x
  2. Step 2: Convert to fraction form
    7,318,610.69/10,978,455.29 = 1,927,223.75/x
  3. Step 3: Cross multiply
    7,318,610.69x = 10,978,455.29 × 1,927,223.75
  4. Step 4: Simplify right side
    7,318,610.69x = 21,157,939,791,011.16
  5. Step 5: Solve for x
    x = 21,157,939,791,011.16/7,318,610.69
  6. Step 6: Final answer
    x = 2,890,977.63

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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.