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Finding the Fourth Proportional to 405,883.44, 608,818.68 and 139,646.25

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Solution

The fourth proportional to 405,883.44, 608,818.68 and 139,646.25 is: 209,467.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,883.44 : 608,818.68 = 139,646.25 : x
  2. Step 2: Convert to fraction form
    405,883.44/608,818.68 = 139,646.25/x
  3. Step 3: Cross multiply
    405,883.44x = 608,818.68 × 139,646.25
  4. Step 4: Simplify right side
    405,883.44x = 85,019,245,591.95
  5. Step 5: Solve for x
    x = 85,019,245,591.95/405,883.44
  6. Step 6: Final answer
    x = 209,467.15

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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.