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Finding the Fourth Proportional to 816,751.20, 1,225,564.20 and 343,484.40

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Solution

The fourth proportional to 816,751.20, 1,225,564.20 and 343,484.40 is: 515,410.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,751.20 : 1,225,564.20 = 343,484.40 : x
  2. Step 2: Convert to fraction form
    816,751.20/1,225,564.20 = 343,484.40/x
  3. Step 3: Cross multiply
    816,751.20x = 1,225,564.20 × 343,484.40
  4. Step 4: Simplify right side
    816,751.20x = 420,962,183,898.48
  5. Step 5: Solve for x
    x = 420,962,183,898.48/816,751.20
  6. Step 6: Final answer
    x = 515,410.55

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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.