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Finding the Fourth Proportional to 403.01, 555.81 and 255.59

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Solution

The fourth proportional to 403.01, 555.81 and 255.59 is: 352.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.01 : 555.81 = 255.59 : x
  2. Step 2: Convert to fraction form
    403.01/555.81 = 255.59/x
  3. Step 3: Cross multiply
    403.01x = 555.81 × 255.59
  4. Step 4: Simplify right side
    403.01x = 142,056.70
  5. Step 5: Solve for x
    x = 142,056.70/403.01
  6. Step 6: Final answer
    x = 352.49

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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.