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Finding the Fourth Proportional to 797.80, 1,199.40 and 637.24

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Solution

The fourth proportional to 797.80, 1,199.40 and 637.24 is: 958.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.80 : 1,199.40 = 637.24 : x
  2. Step 2: Convert to fraction form
    797.80/1,199.40 = 637.24/x
  3. Step 3: Cross multiply
    797.80x = 1,199.40 × 637.24
  4. Step 4: Simplify right side
    797.80x = 764,305.66
  5. Step 5: Solve for x
    x = 764,305.66/797.80
  6. Step 6: Final answer
    x = 958.02

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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.