Home / 2,137.99-2,945.85-1,438.15

Finding the Fourth Proportional to 2,137.99, 2,945.85 and 1,438.15

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Solution

The fourth proportional to 2,137.99, 2,945.85 and 1,438.15 is: 1,981.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.99 : 2,945.85 = 1,438.15 : x
  2. Step 2: Convert to fraction form
    2,137.99/2,945.85 = 1,438.15/x
  3. Step 3: Cross multiply
    2,137.99x = 2,945.85 × 1,438.15
  4. Step 4: Simplify right side
    2,137.99x = 4,236,574.18
  5. Step 5: Solve for x
    x = 4,236,574.18/2,137.99
  6. Step 6: Final answer
    x = 1,981.57

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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.