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Finding the Fourth Proportional to 804.98, 1,209.32 and 480.57

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Solution

The fourth proportional to 804.98, 1,209.32 and 480.57 is: 721.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.98 : 1,209.32 = 480.57 : x
  2. Step 2: Convert to fraction form
    804.98/1,209.32 = 480.57/x
  3. Step 3: Cross multiply
    804.98x = 1,209.32 × 480.57
  4. Step 4: Simplify right side
    804.98x = 581,160.51
  5. Step 5: Solve for x
    x = 581,160.51/804.98
  6. Step 6: Final answer
    x = 721.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.