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Finding the Fourth Proportional to 388, 581.46 and 336.76

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Solution

The fourth proportional to 388, 581.46 and 336.76 is: 504.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    388 : 581.46 = 336.76 : x
  2. Step 2: Convert to fraction form
    388/581.46 = 336.76/x
  3. Step 3: Cross multiply
    388x = 581.46 × 336.76
  4. Step 4: Simplify right side
    388x = 195,812.47
  5. Step 5: Solve for x
    x = 195,812.47/388
  6. Step 6: Final answer
    x = 504.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.