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Finding the Fourth Proportional to 348.40, 520.45 and 346.72

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Solution

The fourth proportional to 348.40, 520.45 and 346.72 is: 517.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.40 : 520.45 = 346.72 : x
  2. Step 2: Convert to fraction form
    348.40/520.45 = 346.72/x
  3. Step 3: Cross multiply
    348.40x = 520.45 × 346.72
  4. Step 4: Simplify right side
    348.40x = 180,450.42
  5. Step 5: Solve for x
    x = 180,450.42/348.40
  6. Step 6: Final answer
    x = 517.94

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.