Home / 811,819.80-1,217,704.60-385,662.40

Finding the Fourth Proportional to 811,819.80, 1,217,704.60 and 385,662.40

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Solution

The fourth proportional to 811,819.80, 1,217,704.60 and 385,662.40 is: 578,481.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,819.80 : 1,217,704.60 = 385,662.40 : x
  2. Step 2: Convert to fraction form
    811,819.80/1,217,704.60 = 385,662.40/x
  3. Step 3: Cross multiply
    811,819.80x = 1,217,704.60 × 385,662.40
  4. Step 4: Simplify right side
    811,819.80x = 469,622,878,527.04
  5. Step 5: Solve for x
    x = 469,622,878,527.04/811,819.80
  6. Step 6: Final answer
    x = 578,481.68

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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.