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Finding the Fourth Proportional to 804.26, 1,205.04 and 511.04

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Solution

The fourth proportional to 804.26, 1,205.04 and 511.04 is: 765.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.26 : 1,205.04 = 511.04 : x
  2. Step 2: Convert to fraction form
    804.26/1,205.04 = 511.04/x
  3. Step 3: Cross multiply
    804.26x = 1,205.04 × 511.04
  4. Step 4: Simplify right side
    804.26x = 615,823.64
  5. Step 5: Solve for x
    x = 615,823.64/804.26
  6. Step 6: Final answer
    x = 765.70

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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.