Home / 3,120.51-4,678.46-1,887.62

Finding the Fourth Proportional to 3,120.51, 4,678.46 and 1,887.62

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Solution

The fourth proportional to 3,120.51, 4,678.46 and 1,887.62 is: 2,830.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.51 : 4,678.46 = 1,887.62 : x
  2. Step 2: Convert to fraction form
    3,120.51/4,678.46 = 1,887.62/x
  3. Step 3: Cross multiply
    3,120.51x = 4,678.46 × 1,887.62
  4. Step 4: Simplify right side
    3,120.51x = 8,831,145.23
  5. Step 5: Solve for x
    x = 8,831,145.23/3,120.51
  6. Step 6: Final answer
    x = 2,830.03

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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.