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Finding the Fourth Proportional to 685,860.33, 946,477 and 379,935.79

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Solution

The fourth proportional to 685,860.33, 946,477 and 379,935.79 is: 524,305.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,860.33 : 946,477 = 379,935.79 : x
  2. Step 2: Convert to fraction form
    685,860.33/946,477 = 379,935.79/x
  3. Step 3: Cross multiply
    685,860.33x = 946,477 × 379,935.79
  4. Step 4: Simplify right side
    685,860.33x = 359,600,486,711.83
  5. Step 5: Solve for x
    x = 359,600,486,711.83/685,860.33
  6. Step 6: Final answer
    x = 524,305.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.