Home / 686,453.55-1,029,669.27-213,139.36

Finding the Fourth Proportional to 686,453.55, 1,029,669.27 and 213,139.36

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Solution

The fourth proportional to 686,453.55, 1,029,669.27 and 213,139.36 is: 319,705.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,453.55 : 1,029,669.27 = 213,139.36 : x
  2. Step 2: Convert to fraction form
    686,453.55/1,029,669.27 = 213,139.36/x
  3. Step 3: Cross multiply
    686,453.55x = 1,029,669.27 × 213,139.36
  4. Step 4: Simplify right side
    686,453.55x = 219,463,049,219.47
  5. Step 5: Solve for x
    x = 219,463,049,219.47/686,453.55
  6. Step 6: Final answer
    x = 319,705.61

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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.