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Finding the Fourth Proportional to 3,131.59, 4,697.39 and 1,399

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Solution

The fourth proportional to 3,131.59, 4,697.39 and 1,399 is: 2,098.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.59 : 4,697.39 = 1,399 : x
  2. Step 2: Convert to fraction form
    3,131.59/4,697.39 = 1,399/x
  3. Step 3: Cross multiply
    3,131.59x = 4,697.39 × 1,399
  4. Step 4: Simplify right side
    3,131.59x = 6,571,648.61
  5. Step 5: Solve for x
    x = 6,571,648.61/3,131.59
  6. Step 6: Final answer
    x = 2,098.50

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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.