Home / 3,319.61-4,979.88-1,128.69

Finding the Fourth Proportional to 3,319.61, 4,979.88 and 1,128.69

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Solution

The fourth proportional to 3,319.61, 4,979.88 and 1,128.69 is: 1,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,319.61 : 4,979.88 = 1,128.69 : x
  2. Step 2: Convert to fraction form
    3,319.61/4,979.88 = 1,128.69/x
  3. Step 3: Cross multiply
    3,319.61x = 4,979.88 × 1,128.69
  4. Step 4: Simplify right side
    3,319.61x = 5,620,740.76
  5. Step 5: Solve for x
    x = 5,620,740.76/3,319.61
  6. Step 6: Final answer
    x = 1,693.20

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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.