Home / 2,790.45-4,185.68-710.47

Finding the Fourth Proportional to 2,790.45, 4,185.68 and 710.47

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Solution

The fourth proportional to 2,790.45, 4,185.68 and 710.47 is: 1,065.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.45 : 4,185.68 = 710.47 : x
  2. Step 2: Convert to fraction form
    2,790.45/4,185.68 = 710.47/x
  3. Step 3: Cross multiply
    2,790.45x = 4,185.68 × 710.47
  4. Step 4: Simplify right side
    2,790.45x = 2,973,786.05
  5. Step 5: Solve for x
    x = 2,973,786.05/2,790.45
  6. Step 6: Final answer
    x = 1,065.70

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1.5x scale

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.