Home / 2,285.63-3,154.33-1,389.72

Finding the Fourth Proportional to 2,285.63, 3,154.33 and 1,389.72

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Solution

The fourth proportional to 2,285.63, 3,154.33 and 1,389.72 is: 1,917.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.63 : 3,154.33 = 1,389.72 : x
  2. Step 2: Convert to fraction form
    2,285.63/3,154.33 = 1,389.72/x
  3. Step 3: Cross multiply
    2,285.63x = 3,154.33 × 1,389.72
  4. Step 4: Simplify right side
    2,285.63x = 4,383,649.05
  5. Step 5: Solve for x
    x = 4,383,649.05/2,285.63
  6. Step 6: Final answer
    x = 1,917.92

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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.