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Finding the Fourth Proportional to 303.84, 453.24 and 285.21

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Solution

The fourth proportional to 303.84, 453.24 and 285.21 is: 425.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.84 : 453.24 = 285.21 : x
  2. Step 2: Convert to fraction form
    303.84/453.24 = 285.21/x
  3. Step 3: Cross multiply
    303.84x = 453.24 × 285.21
  4. Step 4: Simplify right side
    303.84x = 129,268.58
  5. Step 5: Solve for x
    x = 129,268.58/303.84
  6. Step 6: Final answer
    x = 425.45

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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.