Home / 1,898.11-2,618.58-1,111.78

Finding the Fourth Proportional to 1,898.11, 2,618.58 and 1,111.78

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Solution

The fourth proportional to 1,898.11, 2,618.58 and 1,111.78 is: 1,533.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,898.11 : 2,618.58 = 1,111.78 : x
  2. Step 2: Convert to fraction form
    1,898.11/2,618.58 = 1,111.78/x
  3. Step 3: Cross multiply
    1,898.11x = 2,618.58 × 1,111.78
  4. Step 4: Simplify right side
    1,898.11x = 2,911,284.87
  5. Step 5: Solve for x
    x = 2,911,284.87/1,898.11
  6. Step 6: Final answer
    x = 1,533.78

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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.