Home / 2,945.99-4,065.75-1,687.15

Finding the Fourth Proportional to 2,945.99, 4,065.75 and 1,687.15

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Solution

The fourth proportional to 2,945.99, 4,065.75 and 1,687.15 is: 2,328.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,945.99 : 4,065.75 = 1,687.15 : x
  2. Step 2: Convert to fraction form
    2,945.99/4,065.75 = 1,687.15/x
  3. Step 3: Cross multiply
    2,945.99x = 4,065.75 × 1,687.15
  4. Step 4: Simplify right side
    2,945.99x = 6,859,530.11
  5. Step 5: Solve for x
    x = 6,859,530.11/2,945.99
  6. Step 6: Final answer
    x = 2,328.43

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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.