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Finding the Fourth Proportional to 203.90, 305.58 and 117.30

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Solution

The fourth proportional to 203.90, 305.58 and 117.30 is: 175.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.90 : 305.58 = 117.30 : x
  2. Step 2: Convert to fraction form
    203.90/305.58 = 117.30/x
  3. Step 3: Cross multiply
    203.90x = 305.58 × 117.30
  4. Step 4: Simplify right side
    203.90x = 35,844.53
  5. Step 5: Solve for x
    x = 35,844.53/203.90
  6. Step 6: Final answer
    x = 175.80

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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.