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Finding the Fourth Proportional to 405,461.92, 608,134.96 and 139,217.44

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Solution

The fourth proportional to 405,461.92, 608,134.96 and 139,217.44 is: 208,806.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,461.92 : 608,134.96 = 139,217.44 : x
  2. Step 2: Convert to fraction form
    405,461.92/608,134.96 = 139,217.44/x
  3. Step 3: Cross multiply
    405,461.92x = 608,134.96 × 139,217.44
  4. Step 4: Simplify right side
    405,461.92x = 84,662,992,305.70
  5. Step 5: Solve for x
    x = 84,662,992,305.70/405,461.92
  6. Step 6: Final answer
    x = 208,806.27

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1.5x scale

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.