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Finding the Fourth Proportional to 2,658.69, 3,989.70 and 1,015.41

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Solution

The fourth proportional to 2,658.69, 3,989.70 and 1,015.41 is: 1,523.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.69 : 3,989.70 = 1,015.41 : x
  2. Step 2: Convert to fraction form
    2,658.69/3,989.70 = 1,015.41/x
  3. Step 3: Cross multiply
    2,658.69x = 3,989.70 × 1,015.41
  4. Step 4: Simplify right side
    2,658.69x = 4,051,181.28
  5. Step 5: Solve for x
    x = 4,051,181.28/2,658.69
  6. Step 6: Final answer
    x = 1,523.75

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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.