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Finding the Fourth Proportional to 225.84, 311.78 and 152.25

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Solution

The fourth proportional to 225.84, 311.78 and 152.25 is: 210.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.84 : 311.78 = 152.25 : x
  2. Step 2: Convert to fraction form
    225.84/311.78 = 152.25/x
  3. Step 3: Cross multiply
    225.84x = 311.78 × 152.25
  4. Step 4: Simplify right side
    225.84x = 47,467.74
  5. Step 5: Solve for x
    x = 47,467.74/225.84
  6. Step 6: Final answer
    x = 210.18

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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.