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Finding the Fourth Proportional to 313.36, 432.42 and 180.55

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Solution

The fourth proportional to 313.36, 432.42 and 180.55 is: 249.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.36 : 432.42 = 180.55 : x
  2. Step 2: Convert to fraction form
    313.36/432.42 = 180.55/x
  3. Step 3: Cross multiply
    313.36x = 432.42 × 180.55
  4. Step 4: Simplify right side
    313.36x = 78,073.43
  5. Step 5: Solve for x
    x = 78,073.43/313.36
  6. Step 6: Final answer
    x = 249.15

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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.