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Finding the Fourth Proportional to 889.40, 1,221.84 and 797.33

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Solution

The fourth proportional to 889.40, 1,221.84 and 797.33 is: 1,095.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.40 : 1,221.84 = 797.33 : x
  2. Step 2: Convert to fraction form
    889.40/1,221.84 = 797.33/x
  3. Step 3: Cross multiply
    889.40x = 1,221.84 × 797.33
  4. Step 4: Simplify right side
    889.40x = 974,209.69
  5. Step 5: Solve for x
    x = 974,209.69/889.40
  6. Step 6: Final answer
    x = 1,095.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.