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Finding the Fourth Proportional to 2,658.51, 3,989.43 and 1,015.20

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Solution

The fourth proportional to 2,658.51, 3,989.43 and 1,015.20 is: 1,523.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.51 : 3,989.43 = 1,015.20 : x
  2. Step 2: Convert to fraction form
    2,658.51/3,989.43 = 1,015.20/x
  3. Step 3: Cross multiply
    2,658.51x = 3,989.43 × 1,015.20
  4. Step 4: Simplify right side
    2,658.51x = 4,050,069.34
  5. Step 5: Solve for x
    x = 4,050,069.34/2,658.51
  6. Step 6: Final answer
    x = 1,523.44

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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.