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Finding the Fourth Proportional to 644.13, 888.95 and 360.57

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Solution

The fourth proportional to 644.13, 888.95 and 360.57 is: 497.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.13 : 888.95 = 360.57 : x
  2. Step 2: Convert to fraction form
    644.13/888.95 = 360.57/x
  3. Step 3: Cross multiply
    644.13x = 888.95 × 360.57
  4. Step 4: Simplify right side
    644.13x = 320,528.70
  5. Step 5: Solve for x
    x = 320,528.70/644.13
  6. Step 6: Final answer
    x = 497.61

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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.