Home / 1,917.90-2,641.86-1,357.38

Finding the Fourth Proportional to 1,917.90, 2,641.86 and 1,357.38

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Solution

The fourth proportional to 1,917.90, 2,641.86 and 1,357.38 is: 1,869.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,917.90 : 2,641.86 = 1,357.38 : x
  2. Step 2: Convert to fraction form
    1,917.90/2,641.86 = 1,357.38/x
  3. Step 3: Cross multiply
    1,917.90x = 2,641.86 × 1,357.38
  4. Step 4: Simplify right side
    1,917.90x = 3,586,007.93
  5. Step 5: Solve for x
    x = 3,586,007.93/1,917.90
  6. Step 6: Final answer
    x = 1,869.76

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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.