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Finding the Fourth Proportional to 255.89, 353.04 and 145.32

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Solution

The fourth proportional to 255.89, 353.04 and 145.32 is: 200.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.89 : 353.04 = 145.32 : x
  2. Step 2: Convert to fraction form
    255.89/353.04 = 145.32/x
  3. Step 3: Cross multiply
    255.89x = 353.04 × 145.32
  4. Step 4: Simplify right side
    255.89x = 51,303.77
  5. Step 5: Solve for x
    x = 51,303.77/255.89
  6. Step 6: Final answer
    x = 200.50

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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.