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Finding the Fourth Proportional to 256.08, 353.41 and 151.20

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Solution

The fourth proportional to 256.08, 353.41 and 151.20 is: 208.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.08 : 353.41 = 151.20 : x
  2. Step 2: Convert to fraction form
    256.08/353.41 = 151.20/x
  3. Step 3: Cross multiply
    256.08x = 353.41 × 151.20
  4. Step 4: Simplify right side
    256.08x = 53,434.71
  5. Step 5: Solve for x
    x = 53,434.71/256.08
  6. Step 6: Final answer
    x = 208.67

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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.