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Finding the Fourth Proportional to 357.44, 492.84 and 287.36

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Solution

The fourth proportional to 357.44, 492.84 and 287.36 is: 396.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.44 : 492.84 = 287.36 : x
  2. Step 2: Convert to fraction form
    357.44/492.84 = 287.36/x
  3. Step 3: Cross multiply
    357.44x = 492.84 × 287.36
  4. Step 4: Simplify right side
    357.44x = 141,622.50
  5. Step 5: Solve for x
    x = 141,622.50/357.44
  6. Step 6: Final answer
    x = 396.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.