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Finding the Fourth Proportional to 804.03, 1,109.55 and 489.34

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Solution

The fourth proportional to 804.03, 1,109.55 and 489.34 is: 675.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.03 : 1,109.55 = 489.34 : x
  2. Step 2: Convert to fraction form
    804.03/1,109.55 = 489.34/x
  3. Step 3: Cross multiply
    804.03x = 1,109.55 × 489.34
  4. Step 4: Simplify right side
    804.03x = 542,947.20
  5. Step 5: Solve for x
    x = 542,947.20/804.03
  6. Step 6: Final answer
    x = 675.28

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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.