Home / 405,285.21-608,032.86-215,589.36

Finding the Fourth Proportional to 405,285.21, 608,032.86 and 215,589.36

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Solution

The fourth proportional to 405,285.21, 608,032.86 and 215,589.36 is: 323,439.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,285.21 : 608,032.86 = 215,589.36 : x
  2. Step 2: Convert to fraction form
    405,285.21/608,032.86 = 215,589.36/x
  3. Step 3: Cross multiply
    405,285.21x = 608,032.86 × 215,589.36
  4. Step 4: Simplify right side
    405,285.21x = 131,085,415,146.37
  5. Step 5: Solve for x
    x = 131,085,415,146.37/405,285.21
  6. Step 6: Final answer
    x = 323,439.92

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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.