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Finding the Fourth Proportional to 2,898.72, 4,338.90 and 1,857.33

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Solution

The fourth proportional to 2,898.72, 4,338.90 and 1,857.33 is: 2,780.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,898.72 : 4,338.90 = 1,857.33 : x
  2. Step 2: Convert to fraction form
    2,898.72/4,338.90 = 1,857.33/x
  3. Step 3: Cross multiply
    2,898.72x = 4,338.90 × 1,857.33
  4. Step 4: Simplify right side
    2,898.72x = 8,058,769.14
  5. Step 5: Solve for x
    x = 8,058,769.14/2,898.72
  6. Step 6: Final answer
    x = 2,780.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.