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Finding the Fourth Proportional to 3,400.79, 4,702.05 and 3,105.54

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Solution

The fourth proportional to 3,400.79, 4,702.05 and 3,105.54 is: 4,293.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,400.79 : 4,702.05 = 3,105.54 : x
  2. Step 2: Convert to fraction form
    3,400.79/4,702.05 = 3,105.54/x
  3. Step 3: Cross multiply
    3,400.79x = 4,702.05 × 3,105.54
  4. Step 4: Simplify right side
    3,400.79x = 14,602,404.36
  5. Step 5: Solve for x
    x = 14,602,404.36/3,400.79
  6. Step 6: Final answer
    x = 4,293.83

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1.5x scale

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.