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Finding the Fourth Proportional to 543,267.30, 815,010.30 and 455,131.20

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Solution

The fourth proportional to 543,267.30, 815,010.30 and 455,131.20 is: 682,788.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,267.30 : 815,010.30 = 455,131.20 : x
  2. Step 2: Convert to fraction form
    543,267.30/815,010.30 = 455,131.20/x
  3. Step 3: Cross multiply
    543,267.30x = 815,010.30 × 455,131.20
  4. Step 4: Simplify right side
    543,267.30x = 370,936,615,851.36
  5. Step 5: Solve for x
    x = 370,936,615,851.36/543,267.30
  6. Step 6: Final answer
    x = 682,788.41

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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.