Home / 3,159.90-4,739.81-1,428.53

Finding the Fourth Proportional to 3,159.90, 4,739.81 and 1,428.53

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Solution

The fourth proportional to 3,159.90, 4,739.81 and 1,428.53 is: 2,142.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,159.90 : 4,739.81 = 1,428.53 : x
  2. Step 2: Convert to fraction form
    3,159.90/4,739.81 = 1,428.53/x
  3. Step 3: Cross multiply
    3,159.90x = 4,739.81 × 1,428.53
  4. Step 4: Simplify right side
    3,159.90x = 6,770,929.94
  5. Step 5: Solve for x
    x = 6,770,929.94/3,159.90
  6. Step 6: Final answer
    x = 2,142.77

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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.