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Finding the Fourth Proportional to 394,671.88, 592,069.68 and 128,370

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Solution

The fourth proportional to 394,671.88, 592,069.68 and 128,370 is: 192,575.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,671.88 : 592,069.68 = 128,370 : x
  2. Step 2: Convert to fraction form
    394,671.88/592,069.68 = 128,370/x
  3. Step 3: Cross multiply
    394,671.88x = 592,069.68 × 128,370
  4. Step 4: Simplify right side
    394,671.88x = 76,003,984,821.60
  5. Step 5: Solve for x
    x = 76,003,984,821.60/394,671.88
  6. Step 6: Final answer
    x = 192,575.12

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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.