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Finding the Fourth Proportional to 839,791.80, 1,259,687.70 and 307,366.65

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Solution

The fourth proportional to 839,791.80, 1,259,687.70 and 307,366.65 is: 461,049.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,791.80 : 1,259,687.70 = 307,366.65 : x
  2. Step 2: Convert to fraction form
    839,791.80/1,259,687.70 = 307,366.65/x
  3. Step 3: Cross multiply
    839,791.80x = 1,259,687.70 × 307,366.65
  4. Step 4: Simplify right side
    839,791.80x = 387,185,988,395.21
  5. Step 5: Solve for x
    x = 387,185,988,395.21/839,791.80
  6. Step 6: Final answer
    x = 461,049.98

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Double scale
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Similar ratio
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1.5x scale

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.