Home / 2,286.79-3,155.34-1,390.35

Finding the Fourth Proportional to 2,286.79, 3,155.34 and 1,390.35

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Solution

The fourth proportional to 2,286.79, 3,155.34 and 1,390.35 is: 1,918.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,286.79 : 3,155.34 = 1,390.35 : x
  2. Step 2: Convert to fraction form
    2,286.79/3,155.34 = 1,390.35/x
  3. Step 3: Cross multiply
    2,286.79x = 3,155.34 × 1,390.35
  4. Step 4: Simplify right side
    2,286.79x = 4,387,026.97
  5. Step 5: Solve for x
    x = 4,387,026.97/2,286.79
  6. Step 6: Final answer
    x = 1,918.42

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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.