Home / 641,976.04-885,915.94-355,489.96

Finding the Fourth Proportional to 641,976.04, 885,915.94 and 355,489.96

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Solution

The fourth proportional to 641,976.04, 885,915.94 and 355,489.96 is: 490,570.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,976.04 : 885,915.94 = 355,489.96 : x
  2. Step 2: Convert to fraction form
    641,976.04/885,915.94 = 355,489.96/x
  3. Step 3: Cross multiply
    641,976.04x = 885,915.94 × 355,489.96
  4. Step 4: Simplify right side
    641,976.04x = 314,934,222,073.96
  5. Step 5: Solve for x
    x = 314,934,222,073.96/641,976.04
  6. Step 6: Final answer
    x = 490,570.06

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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.