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Finding the Fourth Proportional to 2,179, 3,007.02 and 1,247.68

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Solution

The fourth proportional to 2,179, 3,007.02 and 1,247.68 is: 1,721.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179 : 3,007.02 = 1,247.68 : x
  2. Step 2: Convert to fraction form
    2,179/3,007.02 = 1,247.68/x
  3. Step 3: Cross multiply
    2,179x = 3,007.02 × 1,247.68
  4. Step 4: Simplify right side
    2,179x = 3,751,798.71
  5. Step 5: Solve for x
    x = 3,751,798.71/2,179
  6. Step 6: Final answer
    x = 1,721.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.