Home / 815,377.13-1,222,142.88-415,172.54

Finding the Fourth Proportional to 815,377.13, 1,222,142.88 and 415,172.54

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Solution

The fourth proportional to 815,377.13, 1,222,142.88 and 415,172.54 is: 622,288.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,377.13 : 1,222,142.88 = 415,172.54 : x
  2. Step 2: Convert to fraction form
    815,377.13/1,222,142.88 = 415,172.54/x
  3. Step 3: Cross multiply
    815,377.13x = 1,222,142.88 × 415,172.54
  4. Step 4: Simplify right side
    815,377.13x = 507,400,161,470.22
  5. Step 5: Solve for x
    x = 507,400,161,470.22/815,377.13
  6. Step 6: Final answer
    x = 622,288.93

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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.