Home / 2,285.79-3,153.96-1,389.35

Finding the Fourth Proportional to 2,285.79, 3,153.96 and 1,389.35

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Solution

The fourth proportional to 2,285.79, 3,153.96 and 1,389.35 is: 1,917.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.79 : 3,153.96 = 1,389.35 : x
  2. Step 2: Convert to fraction form
    2,285.79/3,153.96 = 1,389.35/x
  3. Step 3: Cross multiply
    2,285.79x = 3,153.96 × 1,389.35
  4. Step 4: Simplify right side
    2,285.79x = 4,381,938.56
  5. Step 5: Solve for x
    x = 4,381,938.56/2,285.79
  6. Step 6: Final answer
    x = 1,917.03

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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.