Home / 816,288.80-1,225,016.40-343,313.60

Finding the Fourth Proportional to 816,288.80, 1,225,016.40 and 343,313.60

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Solution

The fourth proportional to 816,288.80, 1,225,016.40 and 343,313.60 is: 515,215.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,288.80 : 1,225,016.40 = 343,313.60 : x
  2. Step 2: Convert to fraction form
    816,288.80/1,225,016.40 = 343,313.60/x
  3. Step 3: Cross multiply
    816,288.80x = 1,225,016.40 × 343,313.60
  4. Step 4: Simplify right side
    816,288.80x = 420,564,790,343.04
  5. Step 5: Solve for x
    x = 420,564,790,343.04/816,288.80
  6. Step 6: Final answer
    x = 515,215.68

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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.