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Finding the Fourth Proportional to 356,559.17, 491,768.21 and 303,021.41

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Solution

The fourth proportional to 356,559.17, 491,768.21 and 303,021.41 is: 417,928.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,559.17 : 491,768.21 = 303,021.41 : x
  2. Step 2: Convert to fraction form
    356,559.17/491,768.21 = 303,021.41/x
  3. Step 3: Cross multiply
    356,559.17x = 491,768.21 × 303,021.41
  4. Step 4: Simplify right side
    356,559.17x = 149,016,292,413.43
  5. Step 5: Solve for x
    x = 149,016,292,413.43/356,559.17
  6. Step 6: Final answer
    x = 417,928.66

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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.