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Finding the Fourth Proportional to 797.50, 1,100.55 and 448.21

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Solution

The fourth proportional to 797.50, 1,100.55 and 448.21 is: 618.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.50 : 1,100.55 = 448.21 : x
  2. Step 2: Convert to fraction form
    797.50/1,100.55 = 448.21/x
  3. Step 3: Cross multiply
    797.50x = 1,100.55 × 448.21
  4. Step 4: Simplify right side
    797.50x = 493,277.52
  5. Step 5: Solve for x
    x = 493,277.52/797.50
  6. Step 6: Final answer
    x = 618.53

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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.