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Finding the Fourth Proportional to 543,265.30, 815,007.30 and 455,129.20

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Solution

The fourth proportional to 543,265.30, 815,007.30 and 455,129.20 is: 682,785.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,265.30 : 815,007.30 = 455,129.20 : x
  2. Step 2: Convert to fraction form
    543,265.30/815,007.30 = 455,129.20/x
  3. Step 3: Cross multiply
    543,265.30x = 815,007.30 × 455,129.20
  4. Step 4: Simplify right side
    543,265.30x = 370,933,620,443.16
  5. Step 5: Solve for x
    x = 370,933,620,443.16/543,265.30
  6. Step 6: Final answer
    x = 682,785.41

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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.