Home / 990,908.70-1,486,071.42-280,998.78

Finding the Fourth Proportional to 990,908.70, 1,486,071.42 and 280,998.78

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Solution

The fourth proportional to 990,908.70, 1,486,071.42 and 280,998.78 is: 421,415.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,908.70 : 1,486,071.42 = 280,998.78 : x
  2. Step 2: Convert to fraction form
    990,908.70/1,486,071.42 = 280,998.78/x
  3. Step 3: Cross multiply
    990,908.70x = 1,486,071.42 × 280,998.78
  4. Step 4: Simplify right side
    990,908.70x = 417,584,256,012.87
  5. Step 5: Solve for x
    x = 417,584,256,012.87/990,908.70
  6. Step 6: Final answer
    x = 421,415.47

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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.