Home / 3,131.90-4,688.65-1,647.61

Finding the Fourth Proportional to 3,131.90, 4,688.65 and 1,647.61

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Solution

The fourth proportional to 3,131.90, 4,688.65 and 1,647.61 is: 2,466.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.90 : 4,688.65 = 1,647.61 : x
  2. Step 2: Convert to fraction form
    3,131.90/4,688.65 = 1,647.61/x
  3. Step 3: Cross multiply
    3,131.90x = 4,688.65 × 1,647.61
  4. Step 4: Simplify right side
    3,131.90x = 7,725,056.96
  5. Step 5: Solve for x
    x = 7,725,056.96/3,131.90
  6. Step 6: Final answer
    x = 2,466.57

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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.