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Finding the Fourth Proportional to 1,171,311.72, 1,616,583.54 and 741,631.72

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Solution

The fourth proportional to 1,171,311.72, 1,616,583.54 and 741,631.72 is: 1,023,561.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171,311.72 : 1,616,583.54 = 741,631.72 : x
  2. Step 2: Convert to fraction form
    1,171,311.72/1,616,583.54 = 741,631.72/x
  3. Step 3: Cross multiply
    1,171,311.72x = 1,616,583.54 × 741,631.72
  4. Step 4: Simplify right side
    1,171,311.72x = 1,198,909,631,293.89
  5. Step 5: Solve for x
    x = 1,198,909,631,293.89/1,171,311.72
  6. Step 6: Final answer
    x = 1,023,561.54

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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.