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Finding the Fourth Proportional to 804.33, 1,109.30 and 618.28

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Solution

The fourth proportional to 804.33, 1,109.30 and 618.28 is: 852.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.33 : 1,109.30 = 618.28 : x
  2. Step 2: Convert to fraction form
    804.33/1,109.30 = 618.28/x
  3. Step 3: Cross multiply
    804.33x = 1,109.30 × 618.28
  4. Step 4: Simplify right side
    804.33x = 685,852.14
  5. Step 5: Solve for x
    x = 685,852.14/804.33
  6. Step 6: Final answer
    x = 852.70

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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.