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Finding the Fourth Proportional to 621,724.74, 857,944.89 and 349,804.14

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Solution

The fourth proportional to 621,724.74, 857,944.89 and 349,804.14 is: 482,709.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,724.74 : 857,944.89 = 349,804.14 : x
  2. Step 2: Convert to fraction form
    621,724.74/857,944.89 = 349,804.14/x
  3. Step 3: Cross multiply
    621,724.74x = 857,944.89 × 349,804.14
  4. Step 4: Simplify right side
    621,724.74x = 300,112,674,413.85
  5. Step 5: Solve for x
    x = 300,112,674,413.85/621,724.74
  6. Step 6: Final answer
    x = 482,709.88

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1.5x scale

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.