Home / 812,978.05-1,121,865.52-450,380.28

Finding the Fourth Proportional to 812,978.05, 1,121,865.52 and 450,380.28

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Solution

The fourth proportional to 812,978.05, 1,121,865.52 and 450,380.28 is: 621,500.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,978.05 : 1,121,865.52 = 450,380.28 : x
  2. Step 2: Convert to fraction form
    812,978.05/1,121,865.52 = 450,380.28/x
  3. Step 3: Cross multiply
    812,978.05x = 1,121,865.52 × 450,380.28
  4. Step 4: Simplify right side
    812,978.05x = 505,266,104,768.04
  5. Step 5: Solve for x
    x = 505,266,104,768.04/812,978.05
  6. Step 6: Final answer
    x = 621,500.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.