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Finding the Fourth Proportional to 827,136.10, 1,239,063.90 and 728,502.40

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Solution

The fourth proportional to 827,136.10, 1,239,063.90 and 728,502.40 is: 1,091,308.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,136.10 : 1,239,063.90 = 728,502.40 : x
  2. Step 2: Convert to fraction form
    827,136.10/1,239,063.90 = 728,502.40/x
  3. Step 3: Cross multiply
    827,136.10x = 1,239,063.90 × 728,502.40
  4. Step 4: Simplify right side
    827,136.10x = 902,661,024,903.36
  5. Step 5: Solve for x
    x = 902,661,024,903.36/827,136.10
  6. Step 6: Final answer
    x = 1,091,308.95

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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.