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Finding the Fourth Proportional to 325.48, 487.07 and 280.37

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Solution

The fourth proportional to 325.48, 487.07 and 280.37 is: 419.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.48 : 487.07 = 280.37 : x
  2. Step 2: Convert to fraction form
    325.48/487.07 = 280.37/x
  3. Step 3: Cross multiply
    325.48x = 487.07 × 280.37
  4. Step 4: Simplify right side
    325.48x = 136,559.63
  5. Step 5: Solve for x
    x = 136,559.63/325.48
  6. Step 6: Final answer
    x = 419.57

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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.