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Finding the Fourth Proportional to 2,905.50, 4,008.90 and 1,857.90

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Solution

The fourth proportional to 2,905.50, 4,008.90 and 1,857.90 is: 2,563.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,905.50 : 4,008.90 = 1,857.90 : x
  2. Step 2: Convert to fraction form
    2,905.50/4,008.90 = 1,857.90/x
  3. Step 3: Cross multiply
    2,905.50x = 4,008.90 × 1,857.90
  4. Step 4: Simplify right side
    2,905.50x = 7,448,135.31
  5. Step 5: Solve for x
    x = 7,448,135.31/2,905.50
  6. Step 6: Final answer
    x = 2,563.46

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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.