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Finding the Fourth Proportional to 516,640.80, 773,578.80 and 328,634.40

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Solution

The fourth proportional to 516,640.80, 773,578.80 and 328,634.40 is: 492,072.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,640.80 : 773,578.80 = 328,634.40 : x
  2. Step 2: Convert to fraction form
    516,640.80/773,578.80 = 328,634.40/x
  3. Step 3: Cross multiply
    516,640.80x = 773,578.80 × 328,634.40
  4. Step 4: Simplify right side
    516,640.80x = 254,224,604,790.72
  5. Step 5: Solve for x
    x = 254,224,604,790.72/516,640.80
  6. Step 6: Final answer
    x = 492,072.26

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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.