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Finding the Fourth Proportional to 543,353.30, 815,139.30 and 455,217.20

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Solution

The fourth proportional to 543,353.30, 815,139.30 and 455,217.20 is: 682,917.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,353.30 : 815,139.30 = 455,217.20 : x
  2. Step 2: Convert to fraction form
    543,353.30/815,139.30 = 455,217.20/x
  3. Step 3: Cross multiply
    543,353.30x = 815,139.30 × 455,217.20
  4. Step 4: Simplify right side
    543,353.30x = 371,065,429,755.96
  5. Step 5: Solve for x
    x = 371,065,429,755.96/543,353.30
  6. Step 6: Final answer
    x = 682,917.41

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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.