Home / 2,787,489.90-4,178,410.65-1,889,021.70

Finding the Fourth Proportional to 2,787,489.90, 4,178,410.65 and 1,889,021.70

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Solution

The fourth proportional to 2,787,489.90, 4,178,410.65 and 1,889,021.70 is: 2,831,618.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,787,489.90 : 4,178,410.65 = 1,889,021.70 : x
  2. Step 2: Convert to fraction form
    2,787,489.90/4,178,410.65 = 1,889,021.70/x
  3. Step 3: Cross multiply
    2,787,489.90x = 4,178,410.65 × 1,889,021.70
  4. Step 4: Simplify right side
    2,787,489.90x = 7,893,108,389,361.11
  5. Step 5: Solve for x
    x = 7,893,108,389,361.11/2,787,489.90
  6. Step 6: Final answer
    x = 2,831,618.65

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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.