Home / 1,391.50-2,084.93-979.77

Finding the Fourth Proportional to 1,391.50, 2,084.93 and 979.77

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Solution

The fourth proportional to 1,391.50, 2,084.93 and 979.77 is: 1,468.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.50 : 2,084.93 = 979.77 : x
  2. Step 2: Convert to fraction form
    1,391.50/2,084.93 = 979.77/x
  3. Step 3: Cross multiply
    1,391.50x = 2,084.93 × 979.77
  4. Step 4: Simplify right side
    1,391.50x = 2,042,751.87
  5. Step 5: Solve for x
    x = 2,042,751.87/1,391.50
  6. Step 6: Final answer
    x = 1,468.02

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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.