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Finding the Fourth Proportional to 228.90, 315.75 and 173.55

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Solution

The fourth proportional to 228.90, 315.75 and 173.55 is: 239.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.90 : 315.75 = 173.55 : x
  2. Step 2: Convert to fraction form
    228.90/315.75 = 173.55/x
  3. Step 3: Cross multiply
    228.90x = 315.75 × 173.55
  4. Step 4: Simplify right side
    228.90x = 54,798.41
  5. Step 5: Solve for x
    x = 54,798.41/228.90
  6. Step 6: Final answer
    x = 239.40

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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.