Home / 4,780.80-6,608.52-3,990.24

Finding the Fourth Proportional to 4,780.80, 6,608.52 and 3,990.24

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Solution

The fourth proportional to 4,780.80, 6,608.52 and 3,990.24 is: 5,515.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,780.80 : 6,608.52 = 3,990.24 : x
  2. Step 2: Convert to fraction form
    4,780.80/6,608.52 = 3,990.24/x
  3. Step 3: Cross multiply
    4,780.80x = 6,608.52 × 3,990.24
  4. Step 4: Simplify right side
    4,780.80x = 26,369,580.84
  5. Step 5: Solve for x
    x = 26,369,580.84/4,780.80
  6. Step 6: Final answer
    x = 5,515.73

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1.5x scale

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.