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Finding the Fourth Proportional to 1,415.81, 1,951.09 and 1,082.30

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Solution

The fourth proportional to 1,415.81, 1,951.09 and 1,082.30 is: 1,491.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.81 : 1,951.09 = 1,082.30 : x
  2. Step 2: Convert to fraction form
    1,415.81/1,951.09 = 1,082.30/x
  3. Step 3: Cross multiply
    1,415.81x = 1,951.09 × 1,082.30
  4. Step 4: Simplify right side
    1,415.81x = 2,111,652.25
  5. Step 5: Solve for x
    x = 2,111,652.25/1,415.81
  6. Step 6: Final answer
    x = 1,491.48

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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.