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Finding the Fourth Proportional to 384,381.56, 576,378.77 and 128,123.39

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Solution

The fourth proportional to 384,381.56, 576,378.77 and 128,123.39 is: 192,120.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,381.56 : 576,378.77 = 128,123.39 : x
  2. Step 2: Convert to fraction form
    384,381.56/576,378.77 = 128,123.39/x
  3. Step 3: Cross multiply
    384,381.56x = 576,378.77 × 128,123.39
  4. Step 4: Simplify right side
    384,381.56x = 73,847,598,413.92
  5. Step 5: Solve for x
    x = 73,847,598,413.92/384,381.56
  6. Step 6: Final answer
    x = 192,120.56

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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.