Home / 856,699.38-1,285,112.79-257,612.58

Finding the Fourth Proportional to 856,699.38, 1,285,112.79 and 257,612.58

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Solution

The fourth proportional to 856,699.38, 1,285,112.79 and 257,612.58 is: 386,438.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,699.38 : 1,285,112.79 = 257,612.58 : x
  2. Step 2: Convert to fraction form
    856,699.38/1,285,112.79 = 257,612.58/x
  3. Step 3: Cross multiply
    856,699.38x = 1,285,112.79 × 257,612.58
  4. Step 4: Simplify right side
    856,699.38x = 331,061,221,422.90
  5. Step 5: Solve for x
    x = 331,061,221,422.90/856,699.38
  6. Step 6: Final answer
    x = 386,438.03

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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.