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Finding the Fourth Proportional to 309,578.71, 464,336.94 and 84,961.72

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Solution

The fourth proportional to 309,578.71, 464,336.94 and 84,961.72 is: 127,434.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,578.71 : 464,336.94 = 84,961.72 : x
  2. Step 2: Convert to fraction form
    309,578.71/464,336.94 = 84,961.72/x
  3. Step 3: Cross multiply
    309,578.71x = 464,336.94 × 84,961.72
  4. Step 4: Simplify right side
    309,578.71x = 39,450,865,081.94
  5. Step 5: Solve for x
    x = 39,450,865,081.94/309,578.71
  6. Step 6: Final answer
    x = 127,434.04

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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.