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Finding the Fourth Proportional to 797.21, 1,100.05 and 443.07

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Solution

The fourth proportional to 797.21, 1,100.05 and 443.07 is: 611.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.21 : 1,100.05 = 443.07 : x
  2. Step 2: Convert to fraction form
    797.21/1,100.05 = 443.07/x
  3. Step 3: Cross multiply
    797.21x = 1,100.05 × 443.07
  4. Step 4: Simplify right side
    797.21x = 487,398.05
  5. Step 5: Solve for x
    x = 487,398.05/797.21
  6. Step 6: Final answer
    x = 611.38

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Half scale
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Double scale
Find fourth proportional to 798.21, 1,101.43 and 444.07
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1.5x scale

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.