Home / 641,668.26-885,491.48-355,182.20

Finding the Fourth Proportional to 641,668.26, 885,491.48 and 355,182.20

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Solution

The fourth proportional to 641,668.26, 885,491.48 and 355,182.20 is: 490,145.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,668.26 : 885,491.48 = 355,182.20 : x
  2. Step 2: Convert to fraction form
    641,668.26/885,491.48 = 355,182.20/x
  3. Step 3: Cross multiply
    641,668.26x = 885,491.48 × 355,182.20
  4. Step 4: Simplify right side
    641,668.26x = 314,510,811,947.66
  5. Step 5: Solve for x
    x = 314,510,811,947.66/641,668.26
  6. Step 6: Final answer
    x = 490,145.50

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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.