Home / 420,288.81-629,907.86-270,129.45

Finding the Fourth Proportional to 420,288.81, 629,907.86 and 270,129.45

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Solution

The fourth proportional to 420,288.81, 629,907.86 and 270,129.45 is: 404,856.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,288.81 : 629,907.86 = 270,129.45 : x
  2. Step 2: Convert to fraction form
    420,288.81/629,907.86 = 270,129.45/x
  3. Step 3: Cross multiply
    420,288.81x = 629,907.86 × 270,129.45
  4. Step 4: Simplify right side
    420,288.81x = 170,156,662,421.83
  5. Step 5: Solve for x
    x = 170,156,662,421.83/420,288.81
  6. Step 6: Final answer
    x = 404,856.51

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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.