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Finding the Fourth Proportional to 543,687.30, 815,640.30 and 455,551.20

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Solution

The fourth proportional to 543,687.30, 815,640.30 and 455,551.20 is: 683,418.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,687.30 : 815,640.30 = 455,551.20 : x
  2. Step 2: Convert to fraction form
    543,687.30/815,640.30 = 455,551.20/x
  3. Step 3: Cross multiply
    543,687.30x = 815,640.30 × 455,551.20
  4. Step 4: Simplify right side
    543,687.30x = 371,565,917,433.36
  5. Step 5: Solve for x
    x = 371,565,917,433.36/543,687.30
  6. Step 6: Final answer
    x = 683,418.42

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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.