Home / 905,623.80-1,358,435.70-485,719.80

Finding the Fourth Proportional to 905,623.80, 1,358,435.70 and 485,719.80

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Solution

The fourth proportional to 905,623.80, 1,358,435.70 and 485,719.80 is: 728,579.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,623.80 : 1,358,435.70 = 485,719.80 : x
  2. Step 2: Convert to fraction form
    905,623.80/1,358,435.70 = 485,719.80/x
  3. Step 3: Cross multiply
    905,623.80x = 1,358,435.70 × 485,719.80
  4. Step 4: Simplify right side
    905,623.80x = 659,819,116,516.86
  5. Step 5: Solve for x
    x = 659,819,116,516.86/905,623.80
  6. Step 6: Final answer
    x = 728,579.70

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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.