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Finding the Fourth Proportional to 1,406.10, 1,938.09 and 1,082.10

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Solution

The fourth proportional to 1,406.10, 1,938.09 and 1,082.10 is: 1,491.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.10 : 1,938.09 = 1,082.10 : x
  2. Step 2: Convert to fraction form
    1,406.10/1,938.09 = 1,082.10/x
  3. Step 3: Cross multiply
    1,406.10x = 1,938.09 × 1,082.10
  4. Step 4: Simplify right side
    1,406.10x = 2,097,207.19
  5. Step 5: Solve for x
    x = 2,097,207.19/1,406.10
  6. Step 6: Final answer
    x = 1,491.51

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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.