Home / 2,379.91-3,285.18-2,130.79

Finding the Fourth Proportional to 2,379.91, 3,285.18 and 2,130.79

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Solution

The fourth proportional to 2,379.91, 3,285.18 and 2,130.79 is: 2,941.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.91 : 3,285.18 = 2,130.79 : x
  2. Step 2: Convert to fraction form
    2,379.91/3,285.18 = 2,130.79/x
  3. Step 3: Cross multiply
    2,379.91x = 3,285.18 × 2,130.79
  4. Step 4: Simplify right side
    2,379.91x = 7,000,028.69
  5. Step 5: Solve for x
    x = 7,000,028.69/2,379.91
  6. Step 6: Final answer
    x = 2,941.30

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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.