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Finding the Fourth Proportional to 394,307.46, 591,630.66 and 128,149.56

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Solution

The fourth proportional to 394,307.46, 591,630.66 and 128,149.56 is: 192,279.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,307.46 : 591,630.66 = 128,149.56 : x
  2. Step 2: Convert to fraction form
    394,307.46/591,630.66 = 128,149.56/x
  3. Step 3: Cross multiply
    394,307.46x = 591,630.66 × 128,149.56
  4. Step 4: Simplify right side
    394,307.46x = 75,817,208,761.51
  5. Step 5: Solve for x
    x = 75,817,208,761.51/394,307.46
  6. Step 6: Final answer
    x = 192,279.42

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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.