Home / 1,674.22-2,511.36-687.46

Finding the Fourth Proportional to 1,674.22, 2,511.36 and 687.46

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Solution

The fourth proportional to 1,674.22, 2,511.36 and 687.46 is: 1,031.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,674.22 : 2,511.36 = 687.46 : x
  2. Step 2: Convert to fraction form
    1,674.22/2,511.36 = 687.46/x
  3. Step 3: Cross multiply
    1,674.22x = 2,511.36 × 687.46
  4. Step 4: Simplify right side
    1,674.22x = 1,726,459.55
  5. Step 5: Solve for x
    x = 1,726,459.55/1,674.22
  6. Step 6: Final answer
    x = 1,031.20

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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.