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Finding the Fourth Proportional to 3,978,101.70, 5,967,152.55 and 1,318,709.70

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Solution

The fourth proportional to 3,978,101.70, 5,967,152.55 and 1,318,709.70 is: 1,978,064.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978,101.70 : 5,967,152.55 = 1,318,709.70 : x
  2. Step 2: Convert to fraction form
    3,978,101.70/5,967,152.55 = 1,318,709.70/x
  3. Step 3: Cross multiply
    3,978,101.70x = 5,967,152.55 × 1,318,709.70
  4. Step 4: Simplify right side
    3,978,101.70x = 7,868,941,949,064.74
  5. Step 5: Solve for x
    x = 7,868,941,949,064.74/3,978,101.70
  6. Step 6: Final answer
    x = 1,978,064.55

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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.