Home / 1,638.12-2,457.18-713.58

Finding the Fourth Proportional to 1,638.12, 2,457.18 and 713.58

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Solution

The fourth proportional to 1,638.12, 2,457.18 and 713.58 is: 1,070.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.12 : 2,457.18 = 713.58 : x
  2. Step 2: Convert to fraction form
    1,638.12/2,457.18 = 713.58/x
  3. Step 3: Cross multiply
    1,638.12x = 2,457.18 × 713.58
  4. Step 4: Simplify right side
    1,638.12x = 1,753,394.50
  5. Step 5: Solve for x
    x = 1,753,394.50/1,638.12
  6. Step 6: Final answer
    x = 1,070.37

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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.