Home / 3,128.42-4,688.57-1,277.42

Finding the Fourth Proportional to 3,128.42, 4,688.57 and 1,277.42

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Solution

The fourth proportional to 3,128.42, 4,688.57 and 1,277.42 is: 1,914.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.42 : 4,688.57 = 1,277.42 : x
  2. Step 2: Convert to fraction form
    3,128.42/4,688.57 = 1,277.42/x
  3. Step 3: Cross multiply
    3,128.42x = 4,688.57 × 1,277.42
  4. Step 4: Simplify right side
    3,128.42x = 5,989,243.26
  5. Step 5: Solve for x
    x = 5,989,243.26/3,128.42
  6. Step 6: Final answer
    x = 1,914.47

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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.