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Finding the Fourth Proportional to 545,858.20, 818,787.30 and 431,696.80

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Solution

The fourth proportional to 545,858.20, 818,787.30 and 431,696.80 is: 647,545.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,858.20 : 818,787.30 = 431,696.80 : x
  2. Step 2: Convert to fraction form
    545,858.20/818,787.30 = 431,696.80/x
  3. Step 3: Cross multiply
    545,858.20x = 818,787.30 × 431,696.80
  4. Step 4: Simplify right side
    545,858.20x = 353,467,857,290.64
  5. Step 5: Solve for x
    x = 353,467,857,290.64/545,858.20
  6. Step 6: Final answer
    x = 647,545.20

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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.