Home / 654,186.80-981,280.20-455,121.20

Finding the Fourth Proportional to 654,186.80, 981,280.20 and 455,121.20

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Solution

The fourth proportional to 654,186.80, 981,280.20 and 455,121.20 is: 682,681.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,186.80 : 981,280.20 = 455,121.20 : x
  2. Step 2: Convert to fraction form
    654,186.80/981,280.20 = 455,121.20/x
  3. Step 3: Cross multiply
    654,186.80x = 981,280.20 × 455,121.20
  4. Step 4: Simplify right side
    654,186.80x = 446,601,422,160.24
  5. Step 5: Solve for x
    x = 446,601,422,160.24/654,186.80
  6. Step 6: Final answer
    x = 682,681.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.