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Finding the Fourth Proportional to 1,171.99, 1,760.01 and 1,120.02

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Solution

The fourth proportional to 1,171.99, 1,760.01 and 1,120.02 is: 1,681.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.99 : 1,760.01 = 1,120.02 : x
  2. Step 2: Convert to fraction form
    1,171.99/1,760.01 = 1,120.02/x
  3. Step 3: Cross multiply
    1,171.99x = 1,760.01 × 1,120.02
  4. Step 4: Simplify right side
    1,171.99x = 1,971,246.40
  5. Step 5: Solve for x
    x = 1,971,246.40/1,171.99
  6. Step 6: Final answer
    x = 1,681.97

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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.