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Finding the Fourth Proportional to 312.02, 468.18 and 149.51

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Solution

The fourth proportional to 312.02, 468.18 and 149.51 is: 224.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.02 : 468.18 = 149.51 : x
  2. Step 2: Convert to fraction form
    312.02/468.18 = 149.51/x
  3. Step 3: Cross multiply
    312.02x = 468.18 × 149.51
  4. Step 4: Simplify right side
    312.02x = 69,997.59
  5. Step 5: Solve for x
    x = 69,997.59/312.02
  6. Step 6: Final answer
    x = 224.34

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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.