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Finding the Fourth Proportional to 5,559.60, 7,672.40 and 3,170

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Solution

The fourth proportional to 5,559.60, 7,672.40 and 3,170 is: 4,374.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,559.60 : 7,672.40 = 3,170 : x
  2. Step 2: Convert to fraction form
    5,559.60/7,672.40 = 3,170/x
  3. Step 3: Cross multiply
    5,559.60x = 7,672.40 × 3,170
  4. Step 4: Simplify right side
    5,559.60x = 24,321,508
  5. Step 5: Solve for x
    x = 24,321,508/5,559.60
  6. Step 6: Final answer
    x = 4,374.69

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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.