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Finding the Fourth Proportional to 387.88, 580.56 and 332.80

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Solution

The fourth proportional to 387.88, 580.56 and 332.80 is: 498.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.88 : 580.56 = 332.80 : x
  2. Step 2: Convert to fraction form
    387.88/580.56 = 332.80/x
  3. Step 3: Cross multiply
    387.88x = 580.56 × 332.80
  4. Step 4: Simplify right side
    387.88x = 193,210.37
  5. Step 5: Solve for x
    x = 193,210.37/387.88
  6. Step 6: Final answer
    x = 498.12

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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.