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Finding the Fourth Proportional to 385,129.80, 576,601.20 and 364,183.20

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Solution

The fourth proportional to 385,129.80, 576,601.20 and 364,183.20 is: 545,240.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,129.80 : 576,601.20 = 364,183.20 : x
  2. Step 2: Convert to fraction form
    385,129.80/576,601.20 = 364,183.20/x
  3. Step 3: Cross multiply
    385,129.80x = 576,601.20 × 364,183.20
  4. Step 4: Simplify right side
    385,129.80x = 209,988,470,139.84
  5. Step 5: Solve for x
    x = 209,988,470,139.84/385,129.80
  6. Step 6: Final answer
    x = 545,240.77

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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.