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Finding the Fourth Proportional to 804.03, 1,109.63 and 489.22

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Solution

The fourth proportional to 804.03, 1,109.63 and 489.22 is: 675.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.03 : 1,109.63 = 489.22 : x
  2. Step 2: Convert to fraction form
    804.03/1,109.63 = 489.22/x
  3. Step 3: Cross multiply
    804.03x = 1,109.63 × 489.22
  4. Step 4: Simplify right side
    804.03x = 542,853.19
  5. Step 5: Solve for x
    x = 542,853.19/804.03
  6. Step 6: Final answer
    x = 675.17

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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.