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Finding the Fourth Proportional to 816.37, 1,225.37 and 635.74

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Solution

The fourth proportional to 816.37, 1,225.37 and 635.74 is: 954.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.37 : 1,225.37 = 635.74 : x
  2. Step 2: Convert to fraction form
    816.37/1,225.37 = 635.74/x
  3. Step 3: Cross multiply
    816.37x = 1,225.37 × 635.74
  4. Step 4: Simplify right side
    816.37x = 779,010.48
  5. Step 5: Solve for x
    x = 779,010.48/816.37
  6. Step 6: Final answer
    x = 954.24

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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.