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Finding the Fourth Proportional to 312.04, 468.24 and 287.56

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Solution

The fourth proportional to 312.04, 468.24 and 287.56 is: 431.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.04 : 468.24 = 287.56 : x
  2. Step 2: Convert to fraction form
    312.04/468.24 = 287.56/x
  3. Step 3: Cross multiply
    312.04x = 468.24 × 287.56
  4. Step 4: Simplify right side
    312.04x = 134,647.09
  5. Step 5: Solve for x
    x = 134,647.09/312.04
  6. Step 6: Final answer
    x = 431.51

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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.