Home / 3,319.29-4,979.40-1,128.63

Finding the Fourth Proportional to 3,319.29, 4,979.40 and 1,128.63

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Solution

The fourth proportional to 3,319.29, 4,979.40 and 1,128.63 is: 1,693.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,319.29 : 4,979.40 = 1,128.63 : x
  2. Step 2: Convert to fraction form
    3,319.29/4,979.40 = 1,128.63/x
  3. Step 3: Cross multiply
    3,319.29x = 4,979.40 × 1,128.63
  4. Step 4: Simplify right side
    3,319.29x = 5,619,900.22
  5. Step 5: Solve for x
    x = 5,619,900.22/3,319.29
  6. Step 6: Final answer
    x = 1,693.10

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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.