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Finding the Fourth Proportional to 797.32, 1,100.64 and 619.85

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Solution

The fourth proportional to 797.32, 1,100.64 and 619.85 is: 855.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.32 : 1,100.64 = 619.85 : x
  2. Step 2: Convert to fraction form
    797.32/1,100.64 = 619.85/x
  3. Step 3: Cross multiply
    797.32x = 1,100.64 × 619.85
  4. Step 4: Simplify right side
    797.32x = 682,233.29
  5. Step 5: Solve for x
    x = 682,233.29/797.32
  6. Step 6: Final answer
    x = 855.66

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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.