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Finding the Fourth Proportional to 804.28, 1,205.86 and 284.16

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Solution

The fourth proportional to 804.28, 1,205.86 and 284.16 is: 426.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.28 : 1,205.86 = 284.16 : x
  2. Step 2: Convert to fraction form
    804.28/1,205.86 = 284.16/x
  3. Step 3: Cross multiply
    804.28x = 1,205.86 × 284.16
  4. Step 4: Simplify right side
    804.28x = 342,657.18
  5. Step 5: Solve for x
    x = 342,657.18/804.28
  6. Step 6: Final answer
    x = 426.04

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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.