Home / 405,845.40-608,768.10-219,221.40

Finding the Fourth Proportional to 405,845.40, 608,768.10 and 219,221.40

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Solution

The fourth proportional to 405,845.40, 608,768.10 and 219,221.40 is: 328,832.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,845.40 : 608,768.10 = 219,221.40 : x
  2. Step 2: Convert to fraction form
    405,845.40/608,768.10 = 219,221.40/x
  3. Step 3: Cross multiply
    405,845.40x = 608,768.10 × 219,221.40
  4. Step 4: Simplify right side
    405,845.40x = 133,454,995,157.34
  5. Step 5: Solve for x
    x = 133,454,995,157.34/405,845.40
  6. Step 6: Final answer
    x = 328,832.10

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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.