Home / 686,095.80-1,029,143.70-312,118.80

Finding the Fourth Proportional to 686,095.80, 1,029,143.70 and 312,118.80

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Solution

The fourth proportional to 686,095.80, 1,029,143.70 and 312,118.80 is: 468,178.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,095.80 : 1,029,143.70 = 312,118.80 : x
  2. Step 2: Convert to fraction form
    686,095.80/1,029,143.70 = 312,118.80/x
  3. Step 3: Cross multiply
    686,095.80x = 1,029,143.70 × 312,118.80
  4. Step 4: Simplify right side
    686,095.80x = 321,215,096,671.56
  5. Step 5: Solve for x
    x = 321,215,096,671.56/686,095.80
  6. Step 6: Final answer
    x = 468,178.20

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Double scale
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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.