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Finding the Fourth Proportional to 402.50, 555.50 and 236.71

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Solution

The fourth proportional to 402.50, 555.50 and 236.71 is: 326.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.50 : 555.50 = 236.71 : x
  2. Step 2: Convert to fraction form
    402.50/555.50 = 236.71/x
  3. Step 3: Cross multiply
    402.50x = 555.50 × 236.71
  4. Step 4: Simplify right side
    402.50x = 131,491.61
  5. Step 5: Solve for x
    x = 131,491.61/402.50
  6. Step 6: Final answer
    x = 326.69

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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.