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Finding the Fourth Proportional to 804.19, 1,207.32 and 771.28

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Solution

The fourth proportional to 804.19, 1,207.32 and 771.28 is: 1,157.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.19 : 1,207.32 = 771.28 : x
  2. Step 2: Convert to fraction form
    804.19/1,207.32 = 771.28/x
  3. Step 3: Cross multiply
    804.19x = 1,207.32 × 771.28
  4. Step 4: Simplify right side
    804.19x = 931,180.39
  5. Step 5: Solve for x
    x = 931,180.39/804.19
  6. Step 6: Final answer
    x = 1,157.91

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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.