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Finding the Fourth Proportional to 1,753.90, 2,420.34 and 1,090.50

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Solution

The fourth proportional to 1,753.90, 2,420.34 and 1,090.50 is: 1,504.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,753.90 : 2,420.34 = 1,090.50 : x
  2. Step 2: Convert to fraction form
    1,753.90/2,420.34 = 1,090.50/x
  3. Step 3: Cross multiply
    1,753.90x = 2,420.34 × 1,090.50
  4. Step 4: Simplify right side
    1,753.90x = 2,639,380.77
  5. Step 5: Solve for x
    x = 2,639,380.77/1,753.90
  6. Step 6: Final answer
    x = 1,504.86

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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.