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Finding the Fourth Proportional to 3,491.88, 5,239.71 and 2,319

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Solution

The fourth proportional to 3,491.88, 5,239.71 and 2,319 is: 3,479.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,491.88 : 5,239.71 = 2,319 : x
  2. Step 2: Convert to fraction form
    3,491.88/5,239.71 = 2,319/x
  3. Step 3: Cross multiply
    3,491.88x = 5,239.71 × 2,319
  4. Step 4: Simplify right side
    3,491.88x = 12,150,887.49
  5. Step 5: Solve for x
    x = 12,150,887.49/3,491.88
  6. Step 6: Final answer
    x = 3,479.76

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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.