Home / 1,919.64-2,645.70-1,653.40

Finding the Fourth Proportional to 1,919.64, 2,645.70 and 1,653.40

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Solution

The fourth proportional to 1,919.64, 2,645.70 and 1,653.40 is: 2,278.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.64 : 2,645.70 = 1,653.40 : x
  2. Step 2: Convert to fraction form
    1,919.64/2,645.70 = 1,653.40/x
  3. Step 3: Cross multiply
    1,919.64x = 2,645.70 × 1,653.40
  4. Step 4: Simplify right side
    1,919.64x = 4,374,400.38
  5. Step 5: Solve for x
    x = 4,374,400.38/1,919.64
  6. Step 6: Final answer
    x = 2,278.76

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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.