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Finding the Fourth Proportional to 377.88, 518.70 and 348.72

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Solution

The fourth proportional to 377.88, 518.70 and 348.72 is: 478.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.88 : 518.70 = 348.72 : x
  2. Step 2: Convert to fraction form
    377.88/518.70 = 348.72/x
  3. Step 3: Cross multiply
    377.88x = 518.70 × 348.72
  4. Step 4: Simplify right side
    377.88x = 180,881.06
  5. Step 5: Solve for x
    x = 180,881.06/377.88
  6. Step 6: Final answer
    x = 478.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.