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Finding the Fourth Proportional to 1,207,872.80, 1,811,809.20 and 809,741.60

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Solution

The fourth proportional to 1,207,872.80, 1,811,809.20 and 809,741.60 is: 1,214,612.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207,872.80 : 1,811,809.20 = 809,741.60 : x
  2. Step 2: Convert to fraction form
    1,207,872.80/1,811,809.20 = 809,741.60/x
  3. Step 3: Cross multiply
    1,207,872.80x = 1,811,809.20 × 809,741.60
  4. Step 4: Simplify right side
    1,207,872.80x = 1,467,097,280,502.72
  5. Step 5: Solve for x
    x = 1,467,097,280,502.72/1,207,872.80
  6. Step 6: Final answer
    x = 1,214,612.40

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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.