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Finding the Fourth Proportional to 644.10, 887.67 and 606.30

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Solution

The fourth proportional to 644.10, 887.67 and 606.30 is: 835.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.10 : 887.67 = 606.30 : x
  2. Step 2: Convert to fraction form
    644.10/887.67 = 606.30/x
  3. Step 3: Cross multiply
    644.10x = 887.67 × 606.30
  4. Step 4: Simplify right side
    644.10x = 538,194.32
  5. Step 5: Solve for x
    x = 538,194.32/644.10
  6. Step 6: Final answer
    x = 835.58

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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.