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Finding the Fourth Proportional to 348.12, 519.99 and 261.00

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Solution

The fourth proportional to 348.12, 519.99 and 261.00 is: 389.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.12 : 519.99 = 261.00 : x
  2. Step 2: Convert to fraction form
    348.12/519.99 = 261.00/x
  3. Step 3: Cross multiply
    348.12x = 519.99 × 261.00
  4. Step 4: Simplify right side
    348.12x = 135,717.15
  5. Step 5: Solve for x
    x = 135,717.15/348.12
  6. Step 6: Final answer
    x = 389.85

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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.