Home / 2,988.69-4,123.87-1,729.79

Finding the Fourth Proportional to 2,988.69, 4,123.87 and 1,729.79

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Solution

The fourth proportional to 2,988.69, 4,123.87 and 1,729.79 is: 2,386.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.69 : 4,123.87 = 1,729.79 : x
  2. Step 2: Convert to fraction form
    2,988.69/4,123.87 = 1,729.79/x
  3. Step 3: Cross multiply
    2,988.69x = 4,123.87 × 1,729.79
  4. Step 4: Simplify right side
    2,988.69x = 7,133,429.09
  5. Step 5: Solve for x
    x = 7,133,429.09/2,988.69
  6. Step 6: Final answer
    x = 2,386.81

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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.