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Finding the Fourth Proportional to 1,898.92, 2,620.51 and 1,113.12

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Solution

The fourth proportional to 1,898.92, 2,620.51 and 1,113.12 is: 1,536.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,898.92 : 2,620.51 = 1,113.12 : x
  2. Step 2: Convert to fraction form
    1,898.92/2,620.51 = 1,113.12/x
  3. Step 3: Cross multiply
    1,898.92x = 2,620.51 × 1,113.12
  4. Step 4: Simplify right side
    1,898.92x = 2,916,942.09
  5. Step 5: Solve for x
    x = 2,916,942.09/1,898.92
  6. Step 6: Final answer
    x = 1,536.11

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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.