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Finding the Fourth Proportional to 394,124.45, 543,980.33 and 258,079.38

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Solution

The fourth proportional to 394,124.45, 543,980.33 and 258,079.38 is: 356,207.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,124.45 : 543,980.33 = 258,079.38 : x
  2. Step 2: Convert to fraction form
    394,124.45/543,980.33 = 258,079.38/x
  3. Step 3: Cross multiply
    394,124.45x = 543,980.33 × 258,079.38
  4. Step 4: Simplify right side
    394,124.45x = 140,390,103,936.07
  5. Step 5: Solve for x
    x = 140,390,103,936.07/394,124.45
  6. Step 6: Final answer
    x = 356,207.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.