Home / 686,015.20-1,029,022.80-187,379.20

Finding the Fourth Proportional to 686,015.20, 1,029,022.80 and 187,379.20

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Solution

The fourth proportional to 686,015.20, 1,029,022.80 and 187,379.20 is: 281,068.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,015.20 : 1,029,022.80 = 187,379.20 : x
  2. Step 2: Convert to fraction form
    686,015.20/1,029,022.80 = 187,379.20/x
  3. Step 3: Cross multiply
    686,015.20x = 1,029,022.80 × 187,379.20
  4. Step 4: Simplify right side
    686,015.20x = 192,817,469,045.76
  5. Step 5: Solve for x
    x = 192,817,469,045.76/686,015.20
  6. Step 6: Final answer
    x = 281,068.80

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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.