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Finding the Fourth Proportional to 1,803.31, 2,487.90 and 1,057.00

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Solution

The fourth proportional to 1,803.31, 2,487.90 and 1,057.00 is: 1,458.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,803.31 : 2,487.90 = 1,057.00 : x
  2. Step 2: Convert to fraction form
    1,803.31/2,487.90 = 1,057.00/x
  3. Step 3: Cross multiply
    1,803.31x = 2,487.90 × 1,057.00
  4. Step 4: Simplify right side
    1,803.31x = 2,629,704.08
  5. Step 5: Solve for x
    x = 2,629,704.08/1,803.31
  6. Step 6: Final answer
    x = 1,458.27

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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.