Home / 1,438.76-1,986.66-1,025

Finding the Fourth Proportional to 1,438.76, 1,986.66 and 1,025

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Solution

The fourth proportional to 1,438.76, 1,986.66 and 1,025 is: 1,415.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.76 : 1,986.66 = 1,025 : x
  2. Step 2: Convert to fraction form
    1,438.76/1,986.66 = 1,025/x
  3. Step 3: Cross multiply
    1,438.76x = 1,986.66 × 1,025
  4. Step 4: Simplify right side
    1,438.76x = 2,036,326.50
  5. Step 5: Solve for x
    x = 2,036,326.50/1,438.76
  6. Step 6: Final answer
    x = 1,415.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.