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Finding the Fourth Proportional to 3,385,868.94, 5,078,704.98 and 989,769.87

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Solution

The fourth proportional to 3,385,868.94, 5,078,704.98 and 989,769.87 is: 1,484,626.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,385,868.94 : 5,078,704.98 = 989,769.87 : x
  2. Step 2: Convert to fraction form
    3,385,868.94/5,078,704.98 = 989,769.87/x
  3. Step 3: Cross multiply
    3,385,868.94x = 5,078,704.98 × 989,769.87
  4. Step 4: Simplify right side
    3,385,868.94x = 5,026,749,167,822.95
  5. Step 5: Solve for x
    x = 5,026,749,167,822.95/3,385,868.94
  6. Step 6: Final answer
    x = 1,484,626.03

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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.