Home / 686,449.92-1,029,663.83-213,135.73

Finding the Fourth Proportional to 686,449.92, 1,029,663.83 and 213,135.73

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Solution

The fourth proportional to 686,449.92, 1,029,663.83 and 213,135.73 is: 319,700.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,449.92 : 1,029,663.83 = 213,135.73 : x
  2. Step 2: Convert to fraction form
    686,449.92/1,029,663.83 = 213,135.73/x
  3. Step 3: Cross multiply
    686,449.92x = 1,029,663.83 × 213,135.73
  4. Step 4: Simplify right side
    686,449.92x = 219,458,152,061.65
  5. Step 5: Solve for x
    x = 219,458,152,061.65/686,449.92
  6. Step 6: Final answer
    x = 319,700.16

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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.