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Finding the Fourth Proportional to 328.83, 453.56 and 287.48

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Solution

The fourth proportional to 328.83, 453.56 and 287.48 is: 396.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.83 : 453.56 = 287.48 : x
  2. Step 2: Convert to fraction form
    328.83/453.56 = 287.48/x
  3. Step 3: Cross multiply
    328.83x = 453.56 × 287.48
  4. Step 4: Simplify right side
    328.83x = 130,385.72
  5. Step 5: Solve for x
    x = 130,385.72/328.83
  6. Step 6: Final answer
    x = 396.51

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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.