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Finding the Fourth Proportional to 797.94, 1,195.11 and 643.46

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Solution

The fourth proportional to 797.94, 1,195.11 and 643.46 is: 963.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.94 : 1,195.11 = 643.46 : x
  2. Step 2: Convert to fraction form
    797.94/1,195.11 = 643.46/x
  3. Step 3: Cross multiply
    797.94x = 1,195.11 × 643.46
  4. Step 4: Simplify right side
    797.94x = 768,999.51
  5. Step 5: Solve for x
    x = 768,999.51/797.94
  6. Step 6: Final answer
    x = 963.73

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1.5x scale

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.