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Finding the Fourth Proportional to 402.36, 555.31 and 255.00

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Solution

The fourth proportional to 402.36, 555.31 and 255.00 is: 351.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.36 : 555.31 = 255.00 : x
  2. Step 2: Convert to fraction form
    402.36/555.31 = 255.00/x
  3. Step 3: Cross multiply
    402.36x = 555.31 × 255.00
  4. Step 4: Simplify right side
    402.36x = 141,605.49
  5. Step 5: Solve for x
    x = 141,605.49/402.36
  6. Step 6: Final answer
    x = 351.94

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.