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Finding the Fourth Proportional to 804.44, 1,205.88 and 393.35

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Solution

The fourth proportional to 804.44, 1,205.88 and 393.35 is: 589.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.44 : 1,205.88 = 393.35 : x
  2. Step 2: Convert to fraction form
    804.44/1,205.88 = 393.35/x
  3. Step 3: Cross multiply
    804.44x = 1,205.88 × 393.35
  4. Step 4: Simplify right side
    804.44x = 474,332.90
  5. Step 5: Solve for x
    x = 474,332.90/804.44
  6. Step 6: Final answer
    x = 589.64

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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.