Home / 2,945.86-4,065.63-1,687.12

Finding the Fourth Proportional to 2,945.86, 4,065.63 and 1,687.12

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Solution

The fourth proportional to 2,945.86, 4,065.63 and 1,687.12 is: 2,328.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,945.86 : 4,065.63 = 1,687.12 : x
  2. Step 2: Convert to fraction form
    2,945.86/4,065.63 = 1,687.12/x
  3. Step 3: Cross multiply
    2,945.86x = 4,065.63 × 1,687.12
  4. Step 4: Simplify right side
    2,945.86x = 6,859,205.69
  5. Step 5: Solve for x
    x = 6,859,205.69/2,945.86
  6. Step 6: Final answer
    x = 2,328.42

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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.