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Finding the Fourth Proportional to 394,717.60, 592,162.80 and 128,432.80

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Solution

The fourth proportional to 394,717.60, 592,162.80 and 128,432.80 is: 192,677.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,717.60 : 592,162.80 = 128,432.80 : x
  2. Step 2: Convert to fraction form
    394,717.60/592,162.80 = 128,432.80/x
  3. Step 3: Cross multiply
    394,717.60x = 592,162.80 × 128,432.80
  4. Step 4: Simplify right side
    394,717.60x = 76,053,126,459.84
  5. Step 5: Solve for x
    x = 76,053,126,459.84/394,717.60
  6. Step 6: Final answer
    x = 192,677.31

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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.