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Finding the Fourth Proportional to 646.20, 884.06 and 644.37

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Solution

The fourth proportional to 646.20, 884.06 and 644.37 is: 881.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.20 : 884.06 = 644.37 : x
  2. Step 2: Convert to fraction form
    646.20/884.06 = 644.37/x
  3. Step 3: Cross multiply
    646.20x = 884.06 × 644.37
  4. Step 4: Simplify right side
    646.20x = 569,658.52
  5. Step 5: Solve for x
    x = 569,658.52/646.20
  6. Step 6: Final answer
    x = 881.55

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.