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Finding the Fourth Proportional to 5,388.99, 8,080.62 and 1,690.21

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Solution

The fourth proportional to 5,388.99, 8,080.62 and 1,690.21 is: 2,534.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,388.99 : 8,080.62 = 1,690.21 : x
  2. Step 2: Convert to fraction form
    5,388.99/8,080.62 = 1,690.21/x
  3. Step 3: Cross multiply
    5,388.99x = 8,080.62 × 1,690.21
  4. Step 4: Simplify right side
    5,388.99x = 13,657,944.73
  5. Step 5: Solve for x
    x = 13,657,944.73/5,388.99
  6. Step 6: Final answer
    x = 2,534.42

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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.