Home / 399,215.16-550,929.96-217,936.76

Finding the Fourth Proportional to 399,215.16, 550,929.96 and 217,936.76

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Solution

The fourth proportional to 399,215.16, 550,929.96 and 217,936.76 is: 300,759.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,215.16 : 550,929.96 = 217,936.76 : x
  2. Step 2: Convert to fraction form
    399,215.16/550,929.96 = 217,936.76/x
  3. Step 3: Cross multiply
    399,215.16x = 550,929.96 × 217,936.76
  4. Step 4: Simplify right side
    399,215.16x = 120,067,887,714.68
  5. Step 5: Solve for x
    x = 120,067,887,714.68/399,215.16
  6. Step 6: Final answer
    x = 300,759.84

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1.5x scale

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.