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Finding the Fourth Proportional to 1,898.79, 2,619.43 and 1,235.40

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Solution

The fourth proportional to 1,898.79, 2,619.43 and 1,235.40 is: 1,704.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,898.79 : 2,619.43 = 1,235.40 : x
  2. Step 2: Convert to fraction form
    1,898.79/2,619.43 = 1,235.40/x
  3. Step 3: Cross multiply
    1,898.79x = 2,619.43 × 1,235.40
  4. Step 4: Simplify right side
    1,898.79x = 3,236,043.82
  5. Step 5: Solve for x
    x = 3,236,043.82/1,898.79
  6. Step 6: Final answer
    x = 1,704.27

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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.