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Finding the Fourth Proportional to 394,783.04, 592,020.12 and 128,478.80

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Solution

The fourth proportional to 394,783.04, 592,020.12 and 128,478.80 is: 192,667.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,783.04 : 592,020.12 = 128,478.80 : x
  2. Step 2: Convert to fraction form
    394,783.04/592,020.12 = 128,478.80/x
  3. Step 3: Cross multiply
    394,783.04x = 592,020.12 × 128,478.80
  4. Step 4: Simplify right side
    394,783.04x = 76,062,034,593.46
  5. Step 5: Solve for x
    x = 76,062,034,593.46/394,783.04
  6. Step 6: Final answer
    x = 192,667.94

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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.