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Finding the Fourth Proportional to 377,910, 521,515.92 and 208,143.84

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Solution

The fourth proportional to 377,910, 521,515.92 and 208,143.84 is: 287,238.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,910 : 521,515.92 = 208,143.84 : x
  2. Step 2: Convert to fraction form
    377,910/521,515.92 = 208,143.84/x
  3. Step 3: Cross multiply
    377,910x = 521,515.92 × 208,143.84
  4. Step 4: Simplify right side
    377,910x = 108,550,326,209.93
  5. Step 5: Solve for x
    x = 108,550,326,209.93/377,910
  6. Step 6: Final answer
    x = 287,238.57

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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.