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Finding the Fourth Proportional to 371,908.30, 513,480.61 and 285,713.76

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Solution

The fourth proportional to 371,908.30, 513,480.61 and 285,713.76 is: 394,474.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,908.30 : 513,480.61 = 285,713.76 : x
  2. Step 2: Convert to fraction form
    371,908.30/513,480.61 = 285,713.76/x
  3. Step 3: Cross multiply
    371,908.30x = 513,480.61 × 285,713.76
  4. Step 4: Simplify right side
    371,908.30x = 146,708,475,770.19
  5. Step 5: Solve for x
    x = 146,708,475,770.19/371,908.30
  6. Step 6: Final answer
    x = 394,474.86

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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.