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Finding the Fourth Proportional to 1,541.24, 2,126.91 and 842.60

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Solution

The fourth proportional to 1,541.24, 2,126.91 and 842.60 is: 1,162.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,541.24 : 2,126.91 = 842.60 : x
  2. Step 2: Convert to fraction form
    1,541.24/2,126.91 = 842.60/x
  3. Step 3: Cross multiply
    1,541.24x = 2,126.91 × 842.60
  4. Step 4: Simplify right side
    1,541.24x = 1,792,134.37
  5. Step 5: Solve for x
    x = 1,792,134.37/1,541.24
  6. Step 6: Final answer
    x = 1,162.79

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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.