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Finding the Fourth Proportional to 392,981.96, 542,372.52 and 220,914.09

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Solution

The fourth proportional to 392,981.96, 542,372.52 and 220,914.09 is: 304,893.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,981.96 : 542,372.52 = 220,914.09 : x
  2. Step 2: Convert to fraction form
    392,981.96/542,372.52 = 220,914.09/x
  3. Step 3: Cross multiply
    392,981.96x = 542,372.52 × 220,914.09
  4. Step 4: Simplify right side
    392,981.96x = 119,817,731,696.81
  5. Step 5: Solve for x
    x = 119,817,731,696.81/392,981.96
  6. Step 6: Final answer
    x = 304,893.72

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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.