Home / 641,759.49-885,635.01-355,284.36

Finding the Fourth Proportional to 641,759.49, 885,635.01 and 355,284.36

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Solution

The fourth proportional to 641,759.49, 885,635.01 and 355,284.36 is: 490,296.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,759.49 : 885,635.01 = 355,284.36 : x
  2. Step 2: Convert to fraction form
    641,759.49/885,635.01 = 355,284.36/x
  3. Step 3: Cross multiply
    641,759.49x = 885,635.01 × 355,284.36
  4. Step 4: Simplify right side
    641,759.49x = 314,652,267,721.44
  5. Step 5: Solve for x
    x = 314,652,267,721.44/641,759.49
  6. Step 6: Final answer
    x = 490,296.24

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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.