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Finding the Fourth Proportional to 256.33, 353.70 and 145.81

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Solution

The fourth proportional to 256.33, 353.70 and 145.81 is: 201.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.33 : 353.70 = 145.81 : x
  2. Step 2: Convert to fraction form
    256.33/353.70 = 145.81/x
  3. Step 3: Cross multiply
    256.33x = 353.70 × 145.81
  4. Step 4: Simplify right side
    256.33x = 51,573.00
  5. Step 5: Solve for x
    x = 51,573.00/256.33
  6. Step 6: Final answer
    x = 201.20

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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.