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Finding the Fourth Proportional to 4,608.60, 6,902.10 and 3,139.80

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Solution

The fourth proportional to 4,608.60, 6,902.10 and 3,139.80 is: 4,702.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,608.60 : 6,902.10 = 3,139.80 : x
  2. Step 2: Convert to fraction form
    4,608.60/6,902.10 = 3,139.80/x
  3. Step 3: Cross multiply
    4,608.60x = 6,902.10 × 3,139.80
  4. Step 4: Simplify right side
    4,608.60x = 21,671,213.58
  5. Step 5: Solve for x
    x = 21,671,213.58/4,608.60
  6. Step 6: Final answer
    x = 4,702.34

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1.5x scale

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.