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Finding the Fourth Proportional to 387.00, 579.46 and 325.49

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Solution

The fourth proportional to 387.00, 579.46 and 325.49 is: 487.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.00 : 579.46 = 325.49 : x
  2. Step 2: Convert to fraction form
    387.00/579.46 = 325.49/x
  3. Step 3: Cross multiply
    387.00x = 579.46 × 325.49
  4. Step 4: Simplify right side
    387.00x = 188,607.51
  5. Step 5: Solve for x
    x = 188,607.51/387.00
  6. Step 6: Final answer
    x = 487.36

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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.