Home / 641,921.82-885,841.26-355,435.74

Finding the Fourth Proportional to 641,921.82, 885,841.26 and 355,435.74

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Solution

The fourth proportional to 641,921.82, 885,841.26 and 355,435.74 is: 490,495.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,921.82 : 885,841.26 = 355,435.74 : x
  2. Step 2: Convert to fraction form
    641,921.82/885,841.26 = 355,435.74/x
  3. Step 3: Cross multiply
    641,921.82x = 885,841.26 × 355,435.74
  4. Step 4: Simplify right side
    641,921.82x = 314,859,643,770.63
  5. Step 5: Solve for x
    x = 314,859,643,770.63/641,921.82
  6. Step 6: Final answer
    x = 490,495.31

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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.