Home / 2,138.63-2,951.33-1,207.13

Finding the Fourth Proportional to 2,138.63, 2,951.33 and 1,207.13

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Solution

The fourth proportional to 2,138.63, 2,951.33 and 1,207.13 is: 1,665.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.63 : 2,951.33 = 1,207.13 : x
  2. Step 2: Convert to fraction form
    2,138.63/2,951.33 = 1,207.13/x
  3. Step 3: Cross multiply
    2,138.63x = 2,951.33 × 1,207.13
  4. Step 4: Simplify right side
    2,138.63x = 3,562,638.98
  5. Step 5: Solve for x
    x = 3,562,638.98/2,138.63
  6. Step 6: Final answer
    x = 1,665.85

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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.