Home / 756,220.80-1,131,998.40-439,737.60

Finding the Fourth Proportional to 756,220.80, 1,131,998.40 and 439,737.60

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Solution

The fourth proportional to 756,220.80, 1,131,998.40 and 439,737.60 is: 658,249.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    756,220.80 : 1,131,998.40 = 439,737.60 : x
  2. Step 2: Convert to fraction form
    756,220.80/1,131,998.40 = 439,737.60/x
  3. Step 3: Cross multiply
    756,220.80x = 1,131,998.40 × 439,737.60
  4. Step 4: Simplify right side
    756,220.80x = 497,782,259,619.84
  5. Step 5: Solve for x
    x = 497,782,259,619.84/756,220.80
  6. Step 6: Final answer
    x = 658,249.89

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Double scale
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Similar ratio
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1.5x scale

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.