Home / 667,826.91-921,465.32-395,775.09

Finding the Fourth Proportional to 667,826.91, 921,465.32 and 395,775.09

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Solution

The fourth proportional to 667,826.91, 921,465.32 and 395,775.09 is: 546,089.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,826.91 : 921,465.32 = 395,775.09 : x
  2. Step 2: Convert to fraction form
    667,826.91/921,465.32 = 395,775.09/x
  3. Step 3: Cross multiply
    667,826.91x = 921,465.32 × 395,775.09
  4. Step 4: Simplify right side
    667,826.91x = 364,693,017,976.00
  5. Step 5: Solve for x
    x = 364,693,017,976.00/667,826.91
  6. Step 6: Final answer
    x = 546,089.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.