Home / 420,288.31-629,907.11-270,128.95

Finding the Fourth Proportional to 420,288.31, 629,907.11 and 270,128.95

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Solution

The fourth proportional to 420,288.31, 629,907.11 and 270,128.95 is: 404,855.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,288.31 : 629,907.11 = 270,128.95 : x
  2. Step 2: Convert to fraction form
    420,288.31/629,907.11 = 270,128.95/x
  3. Step 3: Cross multiply
    420,288.31x = 629,907.11 × 270,128.95
  4. Step 4: Simplify right side
    420,288.31x = 170,156,144,871.19
  5. Step 5: Solve for x
    x = 170,156,144,871.19/420,288.31
  6. Step 6: Final answer
    x = 404,855.76

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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.