Home / 1,325.28-1,986.09-1,285.86

Finding the Fourth Proportional to 1,325.28, 1,986.09 and 1,285.86

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Solution

The fourth proportional to 1,325.28, 1,986.09 and 1,285.86 is: 1,927.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.28 : 1,986.09 = 1,285.86 : x
  2. Step 2: Convert to fraction form
    1,325.28/1,986.09 = 1,285.86/x
  3. Step 3: Cross multiply
    1,325.28x = 1,986.09 × 1,285.86
  4. Step 4: Simplify right side
    1,325.28x = 2,553,833.69
  5. Step 5: Solve for x
    x = 2,553,833.69/1,325.28
  6. Step 6: Final answer
    x = 1,927.01

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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.