Home / 438,790.40-657,991.20-202,205.60

Finding the Fourth Proportional to 438,790.40, 657,991.20 and 202,205.60

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Solution

The fourth proportional to 438,790.40, 657,991.20 and 202,205.60 is: 303,218.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,790.40 : 657,991.20 = 202,205.60 : x
  2. Step 2: Convert to fraction form
    438,790.40/657,991.20 = 202,205.60/x
  3. Step 3: Cross multiply
    438,790.40x = 657,991.20 × 202,205.60
  4. Step 4: Simplify right side
    438,790.40x = 133,049,505,390.72
  5. Step 5: Solve for x
    x = 133,049,505,390.72/438,790.40
  6. Step 6: Final answer
    x = 303,218.82

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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.