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Finding the Fourth Proportional to 351.90, 485.63 and 204.53

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Solution

The fourth proportional to 351.90, 485.63 and 204.53 is: 282.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.90 : 485.63 = 204.53 : x
  2. Step 2: Convert to fraction form
    351.90/485.63 = 204.53/x
  3. Step 3: Cross multiply
    351.90x = 485.63 × 204.53
  4. Step 4: Simplify right side
    351.90x = 99,322.45
  5. Step 5: Solve for x
    x = 99,322.45/351.90
  6. Step 6: Final answer
    x = 282.25

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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.