Home / 641,671.28-885,495.62-355,185.20

Finding the Fourth Proportional to 641,671.28, 885,495.62 and 355,185.20

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Solution

The fourth proportional to 641,671.28, 885,495.62 and 355,185.20 is: 490,149.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,671.28 : 885,495.62 = 355,185.20 : x
  2. Step 2: Convert to fraction form
    641,671.28/885,495.62 = 355,185.20/x
  3. Step 3: Cross multiply
    641,671.28x = 885,495.62 × 355,185.20
  4. Step 4: Simplify right side
    641,671.28x = 314,514,938,888.82
  5. Step 5: Solve for x
    x = 314,514,938,888.82/641,671.28
  6. Step 6: Final answer
    x = 490,149.63

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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.