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Finding the Fourth Proportional to 212.04, 315.84 and 201.51

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Solution

The fourth proportional to 212.04, 315.84 and 201.51 is: 300.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.04 : 315.84 = 201.51 : x
  2. Step 2: Convert to fraction form
    212.04/315.84 = 201.51/x
  3. Step 3: Cross multiply
    212.04x = 315.84 × 201.51
  4. Step 4: Simplify right side
    212.04x = 63,644.92
  5. Step 5: Solve for x
    x = 63,644.92/212.04
  6. Step 6: Final answer
    x = 300.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.