Home / 686,317.20-1,029,611.88-212,982.36

Finding the Fourth Proportional to 686,317.20, 1,029,611.88 and 212,982.36

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Solution

The fourth proportional to 686,317.20, 1,029,611.88 and 212,982.36 is: 319,515.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,317.20 : 1,029,611.88 = 212,982.36 : x
  2. Step 2: Convert to fraction form
    686,317.20/1,029,611.88 = 212,982.36/x
  3. Step 3: Cross multiply
    686,317.20x = 1,029,611.88 × 212,982.36
  4. Step 4: Simplify right side
    686,317.20x = 219,289,168,086.44
  5. Step 5: Solve for x
    x = 219,289,168,086.44/686,317.20
  6. Step 6: Final answer
    x = 319,515.77

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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.