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Finding the Fourth Proportional to 325.36, 448.68 and 285.76

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Solution

The fourth proportional to 325.36, 448.68 and 285.76 is: 394.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.36 : 448.68 = 285.76 : x
  2. Step 2: Convert to fraction form
    325.36/448.68 = 285.76/x
  3. Step 3: Cross multiply
    325.36x = 448.68 × 285.76
  4. Step 4: Simplify right side
    325.36x = 128,214.80
  5. Step 5: Solve for x
    x = 128,214.80/325.36
  6. Step 6: Final answer
    x = 394.07

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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.