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Finding the Fourth Proportional to 256.06, 353.36 and 139.62

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Solution

The fourth proportional to 256.06, 353.36 and 139.62 is: 192.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.06 : 353.36 = 139.62 : x
  2. Step 2: Convert to fraction form
    256.06/353.36 = 139.62/x
  3. Step 3: Cross multiply
    256.06x = 353.36 × 139.62
  4. Step 4: Simplify right side
    256.06x = 49,334.76
  5. Step 5: Solve for x
    x = 49,334.76/256.06
  6. Step 6: Final answer
    x = 192.67

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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.