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Finding the Fourth Proportional to 3,987.30, 5,980.22 and 1,521.58

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Solution

The fourth proportional to 3,987.30, 5,980.22 and 1,521.58 is: 2,282.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.30 : 5,980.22 = 1,521.58 : x
  2. Step 2: Convert to fraction form
    3,987.30/5,980.22 = 1,521.58/x
  3. Step 3: Cross multiply
    3,987.30x = 5,980.22 × 1,521.58
  4. Step 4: Simplify right side
    3,987.30x = 9,099,383.15
  5. Step 5: Solve for x
    x = 9,099,383.15/3,987.30
  6. Step 6: Final answer
    x = 2,282.09

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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.