Home / 639,121.26-881,986.71-352,641.36

Finding the Fourth Proportional to 639,121.26, 881,986.71 and 352,641.36

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Solution

The fourth proportional to 639,121.26, 881,986.71 and 352,641.36 is: 486,644.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,121.26 : 881,986.71 = 352,641.36 : x
  2. Step 2: Convert to fraction form
    639,121.26/881,986.71 = 352,641.36/x
  3. Step 3: Cross multiply
    639,121.26x = 881,986.71 × 352,641.36
  4. Step 4: Simplify right side
    639,121.26x = 311,024,992,916.33
  5. Step 5: Solve for x
    x = 311,024,992,916.33/639,121.26
  6. Step 6: Final answer
    x = 486,644.73

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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.