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Finding the Fourth Proportional to 385,795.86, 578,689.46 and 136,419.54

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Solution

The fourth proportional to 385,795.86, 578,689.46 and 136,419.54 is: 204,627.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,795.86 : 578,689.46 = 136,419.54 : x
  2. Step 2: Convert to fraction form
    385,795.86/578,689.46 = 136,419.54/x
  3. Step 3: Cross multiply
    385,795.86x = 578,689.46 × 136,419.54
  4. Step 4: Simplify right side
    385,795.86x = 78,944,549,936.05
  5. Step 5: Solve for x
    x = 78,944,549,936.05/385,795.86
  6. Step 6: Final answer
    x = 204,627.78

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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.