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Finding the Fourth Proportional to 2,979.79, 4,112.07 and 1,653.49

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Solution

The fourth proportional to 2,979.79, 4,112.07 and 1,653.49 is: 2,281.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,979.79 : 4,112.07 = 1,653.49 : x
  2. Step 2: Convert to fraction form
    2,979.79/4,112.07 = 1,653.49/x
  3. Step 3: Cross multiply
    2,979.79x = 4,112.07 × 1,653.49
  4. Step 4: Simplify right side
    2,979.79x = 6,799,266.62
  5. Step 5: Solve for x
    x = 6,799,266.62/2,979.79
  6. Step 6: Final answer
    x = 2,281.79

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