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Finding the Fourth Proportional to 1,077.24, 1,616.27 and 644.70

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Solution

The fourth proportional to 1,077.24, 1,616.27 and 644.70 is: 967.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077.24 : 1,616.27 = 644.70 : x
  2. Step 2: Convert to fraction form
    1,077.24/1,616.27 = 644.70/x
  3. Step 3: Cross multiply
    1,077.24x = 1,616.27 × 644.70
  4. Step 4: Simplify right side
    1,077.24x = 1,042,006.05
  5. Step 5: Solve for x
    x = 1,042,006.05/1,077.24
  6. Step 6: Final answer
    x = 967.29

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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.