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Finding the Fourth Proportional to 408,877.71, 613,341.16 and 128,394.96

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Solution

The fourth proportional to 408,877.71, 613,341.16 and 128,394.96 is: 192,600.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,877.71 : 613,341.16 = 128,394.96 : x
  2. Step 2: Convert to fraction form
    408,877.71/613,341.16 = 128,394.96/x
  3. Step 3: Cross multiply
    408,877.71x = 613,341.16 × 128,394.96
  4. Step 4: Simplify right side
    408,877.71x = 78,749,910,958.84
  5. Step 5: Solve for x
    x = 78,749,910,958.84/408,877.71
  6. Step 6: Final answer
    x = 192,600.16

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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.