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Finding the Fourth Proportional to 1,573.11, 2,171.02 and 909.97

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Solution

The fourth proportional to 1,573.11, 2,171.02 and 909.97 is: 1,255.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,573.11 : 2,171.02 = 909.97 : x
  2. Step 2: Convert to fraction form
    1,573.11/2,171.02 = 909.97/x
  3. Step 3: Cross multiply
    1,573.11x = 2,171.02 × 909.97
  4. Step 4: Simplify right side
    1,573.11x = 1,975,563.07
  5. Step 5: Solve for x
    x = 1,975,563.07/1,573.11
  6. Step 6: Final answer
    x = 1,255.83

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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.