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Finding the Fourth Proportional to 2,658.95, 3,990.08 and 1,015.66

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Solution

The fourth proportional to 2,658.95, 3,990.08 and 1,015.66 is: 1,524.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,658.95 : 3,990.08 = 1,015.66 : x
  2. Step 2: Convert to fraction form
    2,658.95/3,990.08 = 1,015.66/x
  3. Step 3: Cross multiply
    2,658.95x = 3,990.08 × 1,015.66
  4. Step 4: Simplify right side
    2,658.95x = 4,052,564.65
  5. Step 5: Solve for x
    x = 4,052,564.65/2,658.95
  6. Step 6: Final answer
    x = 1,524.12

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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.