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Finding the Fourth Proportional to 804.36, 1,206.18 and 284.19

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Solution

The fourth proportional to 804.36, 1,206.18 and 284.19 is: 426.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.36 : 1,206.18 = 284.19 : x
  2. Step 2: Convert to fraction form
    804.36/1,206.18 = 284.19/x
  3. Step 3: Cross multiply
    804.36x = 1,206.18 × 284.19
  4. Step 4: Simplify right side
    804.36x = 342,784.29
  5. Step 5: Solve for x
    x = 342,784.29/804.36
  6. Step 6: Final answer
    x = 426.16

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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.