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Finding the Fourth Proportional to 4,871,775.78, 7,301,932.92 and 1,991,365.56

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Solution

The fourth proportional to 4,871,775.78, 7,301,932.92 and 1,991,365.56 is: 2,984,705.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,871,775.78 : 7,301,932.92 = 1,991,365.56 : x
  2. Step 2: Convert to fraction form
    4,871,775.78/7,301,932.92 = 1,991,365.56/x
  3. Step 3: Cross multiply
    4,871,775.78x = 7,301,932.92 × 1,991,365.56
  4. Step 4: Simplify right side
    4,871,775.78x = 14,540,817,738,318.24
  5. Step 5: Solve for x
    x = 14,540,817,738,318.24/4,871,775.78
  6. Step 6: Final answer
    x = 2,984,705.86

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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.