Home / 812,725.98-1,121,512.56-450,128.16

Finding the Fourth Proportional to 812,725.98, 1,121,512.56 and 450,128.16

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Solution

The fourth proportional to 812,725.98, 1,121,512.56 and 450,128.16 is: 621,149.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,725.98 : 1,121,512.56 = 450,128.16 : x
  2. Step 2: Convert to fraction form
    812,725.98/1,121,512.56 = 450,128.16/x
  3. Step 3: Cross multiply
    812,725.98x = 1,121,512.56 × 450,128.16
  4. Step 4: Simplify right side
    812,725.98x = 504,824,385,049.69
  5. Step 5: Solve for x
    x = 504,824,385,049.69/812,725.98
  6. Step 6: Final answer
    x = 621,149.56

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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.