Home / 409,329.12-613,963.84-128,926.56

Finding the Fourth Proportional to 409,329.12, 613,963.84 and 128,926.56

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Solution

The fourth proportional to 409,329.12, 613,963.84 and 128,926.56 is: 193,380.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,329.12 : 613,963.84 = 128,926.56 : x
  2. Step 2: Convert to fraction form
    409,329.12/613,963.84 = 128,926.56/x
  3. Step 3: Cross multiply
    409,329.12x = 613,963.84 × 128,926.56
  4. Step 4: Simplify right side
    409,329.12x = 79,156,245,855.59
  5. Step 5: Solve for x
    x = 79,156,245,855.59/409,329.12
  6. Step 6: Final answer
    x = 193,380.44

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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.