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Finding the Fourth Proportional to 555.20, 830.73 and 348.80

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Solution

The fourth proportional to 555.20, 830.73 and 348.80 is: 521.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.20 : 830.73 = 348.80 : x
  2. Step 2: Convert to fraction form
    555.20/830.73 = 348.80/x
  3. Step 3: Cross multiply
    555.20x = 830.73 × 348.80
  4. Step 4: Simplify right side
    555.20x = 289,758.62
  5. Step 5: Solve for x
    x = 289,758.62/555.20
  6. Step 6: Final answer
    x = 521.90

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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.