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Finding the Fourth Proportional to 402.60, 555.60 and 236.81

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Solution

The fourth proportional to 402.60, 555.60 and 236.81 is: 326.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.60 : 555.60 = 236.81 : x
  2. Step 2: Convert to fraction form
    402.60/555.60 = 236.81/x
  3. Step 3: Cross multiply
    402.60x = 555.60 × 236.81
  4. Step 4: Simplify right side
    402.60x = 131,568.86
  5. Step 5: Solve for x
    x = 131,568.86/402.60
  6. Step 6: Final answer
    x = 326.80

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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.