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Finding the Fourth Proportional to 1,205.84, 1,808.44 and 475.28

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Solution

The fourth proportional to 1,205.84, 1,808.44 and 475.28 is: 712.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205.84 : 1,808.44 = 475.28 : x
  2. Step 2: Convert to fraction form
    1,205.84/1,808.44 = 475.28/x
  3. Step 3: Cross multiply
    1,205.84x = 1,808.44 × 475.28
  4. Step 4: Simplify right side
    1,205.84x = 859,515.36
  5. Step 5: Solve for x
    x = 859,515.36/1,205.84
  6. Step 6: Final answer
    x = 712.79

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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.