Home / 686,100.80-1,029,151.20-312,123.80

Finding the Fourth Proportional to 686,100.80, 1,029,151.20 and 312,123.80

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Solution

The fourth proportional to 686,100.80, 1,029,151.20 and 312,123.80 is: 468,185.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,100.80 : 1,029,151.20 = 312,123.80 : x
  2. Step 2: Convert to fraction form
    686,100.80/1,029,151.20 = 312,123.80/x
  3. Step 3: Cross multiply
    686,100.80x = 1,029,151.20 × 312,123.80
  4. Step 4: Simplify right side
    686,100.80x = 321,222,583,318.56
  5. Step 5: Solve for x
    x = 321,222,583,318.56/686,100.80
  6. Step 6: Final answer
    x = 468,185.70

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Similar ratio
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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.