Home / 1,821.10-2,730.90-650.65

Finding the Fourth Proportional to 1,821.10, 2,730.90 and 650.65

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Solution

The fourth proportional to 1,821.10, 2,730.90 and 650.65 is: 975.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.10 : 2,730.90 = 650.65 : x
  2. Step 2: Convert to fraction form
    1,821.10/2,730.90 = 650.65/x
  3. Step 3: Cross multiply
    1,821.10x = 2,730.90 × 650.65
  4. Step 4: Simplify right side
    1,821.10x = 1,776,860.09
  5. Step 5: Solve for x
    x = 1,776,860.09/1,821.10
  6. Step 6: Final answer
    x = 975.71

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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.