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Finding the Fourth Proportional to 228.84, 315.93 and 155.25

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Solution

The fourth proportional to 228.84, 315.93 and 155.25 is: 214.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.84 : 315.93 = 155.25 : x
  2. Step 2: Convert to fraction form
    228.84/315.93 = 155.25/x
  3. Step 3: Cross multiply
    228.84x = 315.93 × 155.25
  4. Step 4: Simplify right side
    228.84x = 49,048.13
  5. Step 5: Solve for x
    x = 49,048.13/228.84
  6. Step 6: Final answer
    x = 214.33

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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.