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Finding the Fourth Proportional to 804.28, 1,206.44 and 256.36

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Solution

The fourth proportional to 804.28, 1,206.44 and 256.36 is: 384.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.28 : 1,206.44 = 256.36 : x
  2. Step 2: Convert to fraction form
    804.28/1,206.44 = 256.36/x
  3. Step 3: Cross multiply
    804.28x = 1,206.44 × 256.36
  4. Step 4: Simplify right side
    804.28x = 309,282.96
  5. Step 5: Solve for x
    x = 309,282.96/804.28
  6. Step 6: Final answer
    x = 384.55

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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.