Home / 394,669.80-592,010.30-128,431.72

Finding the Fourth Proportional to 394,669.80, 592,010.30 and 128,431.72

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Solution

The fourth proportional to 394,669.80, 592,010.30 and 128,431.72 is: 192,649.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,669.80 : 592,010.30 = 128,431.72 : x
  2. Step 2: Convert to fraction form
    394,669.80/592,010.30 = 128,431.72/x
  3. Step 3: Cross multiply
    394,669.80x = 592,010.30 × 128,431.72
  4. Step 4: Simplify right side
    394,669.80x = 76,032,901,086.72
  5. Step 5: Solve for x
    x = 76,032,901,086.72/394,669.80
  6. Step 6: Final answer
    x = 192,649.40

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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.