Home / 2,138.85-2,950.83-1,207.35

Finding the Fourth Proportional to 2,138.85, 2,950.83 and 1,207.35

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Solution

The fourth proportional to 2,138.85, 2,950.83 and 1,207.35 is: 1,665.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.85 : 2,950.83 = 1,207.35 : x
  2. Step 2: Convert to fraction form
    2,138.85/2,950.83 = 1,207.35/x
  3. Step 3: Cross multiply
    2,138.85x = 2,950.83 × 1,207.35
  4. Step 4: Simplify right side
    2,138.85x = 3,562,684.60
  5. Step 5: Solve for x
    x = 3,562,684.60/2,138.85
  6. Step 6: Final answer
    x = 1,665.70

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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.