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Finding the Fourth Proportional to 6,347,738.75, 8,759,881.20 and 3,447,128.85

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Solution

The fourth proportional to 6,347,738.75, 8,759,881.20 and 3,447,128.85 is: 4,757,038.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,347,738.75 : 8,759,881.20 = 3,447,128.85 : x
  2. Step 2: Convert to fraction form
    6,347,738.75/8,759,881.20 = 3,447,128.85/x
  3. Step 3: Cross multiply
    6,347,738.75x = 8,759,881.20 × 3,447,128.85
  4. Step 4: Simplify right side
    6,347,738.75x = 30,196,439,217,054.03
  5. Step 5: Solve for x
    x = 30,196,439,217,054.03/6,347,738.75
  6. Step 6: Final answer
    x = 4,757,038.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.