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Finding the Fourth Proportional to 644.13, 883.11 and 632.45

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Solution

The fourth proportional to 644.13, 883.11 and 632.45 is: 867.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.13 : 883.11 = 632.45 : x
  2. Step 2: Convert to fraction form
    644.13/883.11 = 632.45/x
  3. Step 3: Cross multiply
    644.13x = 883.11 × 632.45
  4. Step 4: Simplify right side
    644.13x = 558,518.50
  5. Step 5: Solve for x
    x = 558,518.50/644.13
  6. Step 6: Final answer
    x = 867.09

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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.