Home / 394,878.28-592,316.94-128,638.36

Finding the Fourth Proportional to 394,878.28, 592,316.94 and 128,638.36

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Solution

The fourth proportional to 394,878.28, 592,316.94 and 128,638.36 is: 192,957.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,878.28 : 592,316.94 = 128,638.36 : x
  2. Step 2: Convert to fraction form
    394,878.28/592,316.94 = 128,638.36/x
  3. Step 3: Cross multiply
    394,878.28x = 592,316.94 × 128,638.36
  4. Step 4: Simplify right side
    394,878.28x = 76,194,679,761.82
  5. Step 5: Solve for x
    x = 76,194,679,761.82/394,878.28
  6. Step 6: Final answer
    x = 192,957.38

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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.