Home / 485,664.69-670,640.27-304,687.74

Finding the Fourth Proportional to 485,664.69, 670,640.27 and 304,687.74

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Solution

The fourth proportional to 485,664.69, 670,640.27 and 304,687.74 is: 420,734.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,664.69 : 670,640.27 = 304,687.74 : x
  2. Step 2: Convert to fraction form
    485,664.69/670,640.27 = 304,687.74/x
  3. Step 3: Cross multiply
    485,664.69x = 670,640.27 × 304,687.74
  4. Step 4: Simplify right side
    485,664.69x = 204,335,866,695.85
  5. Step 5: Solve for x
    x = 204,335,866,695.85/485,664.69
  6. Step 6: Final answer
    x = 420,734.45

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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.