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Finding the Fourth Proportional to 1,104.27, 1,523 and 971.20

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Solution

The fourth proportional to 1,104.27, 1,523 and 971.20 is: 1,339.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.27 : 1,523 = 971.20 : x
  2. Step 2: Convert to fraction form
    1,104.27/1,523 = 971.20/x
  3. Step 3: Cross multiply
    1,104.27x = 1,523 × 971.20
  4. Step 4: Simplify right side
    1,104.27x = 1,479,137.60
  5. Step 5: Solve for x
    x = 1,479,137.60/1,104.27
  6. Step 6: Final answer
    x = 1,339.47

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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.