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Finding the Fourth Proportional to 348.87, 480.42 and 312.02

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Solution

The fourth proportional to 348.87, 480.42 and 312.02 is: 429.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.87 : 480.42 = 312.02 : x
  2. Step 2: Convert to fraction form
    348.87/480.42 = 312.02/x
  3. Step 3: Cross multiply
    348.87x = 480.42 × 312.02
  4. Step 4: Simplify right side
    348.87x = 149,898.25
  5. Step 5: Solve for x
    x = 149,898.25/348.87
  6. Step 6: Final answer
    x = 429.67

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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.