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Finding the Fourth Proportional to 839,161.70, 1,255,790.10 and 768,302.90

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Solution

The fourth proportional to 839,161.70, 1,255,790.10 and 768,302.90 is: 1,149,751.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,161.70 : 1,255,790.10 = 768,302.90 : x
  2. Step 2: Convert to fraction form
    839,161.70/1,255,790.10 = 768,302.90/x
  3. Step 3: Cross multiply
    839,161.70x = 1,255,790.10 × 768,302.90
  4. Step 4: Simplify right side
    839,161.70x = 964,827,175,621.29
  5. Step 5: Solve for x
    x = 964,827,175,621.29/839,161.70
  6. Step 6: Final answer
    x = 1,149,751.20

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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.