Home / 686,605.42-1,029,908.22-213,290.74

Finding the Fourth Proportional to 686,605.42, 1,029,908.22 and 213,290.74

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Solution

The fourth proportional to 686,605.42, 1,029,908.22 and 213,290.74 is: 319,936.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,605.42 : 1,029,908.22 = 213,290.74 : x
  2. Step 2: Convert to fraction form
    686,605.42/1,029,908.22 = 213,290.74/x
  3. Step 3: Cross multiply
    686,605.42x = 1,029,908.22 × 213,290.74
  4. Step 4: Simplify right side
    686,605.42x = 219,669,886,375.88
  5. Step 5: Solve for x
    x = 219,669,886,375.88/686,605.42
  6. Step 6: Final answer
    x = 319,936.14

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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.