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Finding the Fourth Proportional to 436,276.80, 654,328.80 and 211,636.80

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Solution

The fourth proportional to 436,276.80, 654,328.80 and 211,636.80 is: 317,413.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,276.80 : 654,328.80 = 211,636.80 : x
  2. Step 2: Convert to fraction form
    436,276.80/654,328.80 = 211,636.80/x
  3. Step 3: Cross multiply
    436,276.80x = 654,328.80 × 211,636.80
  4. Step 4: Simplify right side
    436,276.80x = 138,480,053,379.84
  5. Step 5: Solve for x
    x = 138,480,053,379.84/436,276.80
  6. Step 6: Final answer
    x = 317,413.29

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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.