Home / 3,139.20-4,700.70-2,491.20

Finding the Fourth Proportional to 3,139.20, 4,700.70 and 2,491.20

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Solution

The fourth proportional to 3,139.20, 4,700.70 and 2,491.20 is: 3,730.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.20 : 4,700.70 = 2,491.20 : x
  2. Step 2: Convert to fraction form
    3,139.20/4,700.70 = 2,491.20/x
  3. Step 3: Cross multiply
    3,139.20x = 4,700.70 × 2,491.20
  4. Step 4: Simplify right side
    3,139.20x = 11,710,383.84
  5. Step 5: Solve for x
    x = 11,710,383.84/3,139.20
  6. Step 6: Final answer
    x = 3,730.37

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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.