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Finding the Fourth Proportional to 5,158.74, 7,739.80 and 1,649.34

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Solution

The fourth proportional to 5,158.74, 7,739.80 and 1,649.34 is: 2,474.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,158.74 : 7,739.80 = 1,649.34 : x
  2. Step 2: Convert to fraction form
    5,158.74/7,739.80 = 1,649.34/x
  3. Step 3: Cross multiply
    5,158.74x = 7,739.80 × 1,649.34
  4. Step 4: Simplify right side
    5,158.74x = 12,765,561.73
  5. Step 5: Solve for x
    x = 12,765,561.73/5,158.74
  6. Step 6: Final answer
    x = 2,474.55

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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.