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Finding the Fourth Proportional to 328,591.54, 492,525.78 and 128,874.70

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Solution

The fourth proportional to 328,591.54, 492,525.78 and 128,874.70 is: 193,170.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,591.54 : 492,525.78 = 128,874.70 : x
  2. Step 2: Convert to fraction form
    328,591.54/492,525.78 = 128,874.70/x
  3. Step 3: Cross multiply
    328,591.54x = 492,525.78 × 128,874.70
  4. Step 4: Simplify right side
    328,591.54x = 63,474,112,139.77
  5. Step 5: Solve for x
    x = 63,474,112,139.77/328,591.54
  6. Step 6: Final answer
    x = 193,170.26

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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.