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Finding the Fourth Proportional to 392,893.60, 542,196.90 and 223,128.94

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Solution

The fourth proportional to 392,893.60, 542,196.90 and 223,128.94 is: 307,920.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,893.60 : 542,196.90 = 223,128.94 : x
  2. Step 2: Convert to fraction form
    392,893.60/542,196.90 = 223,128.94/x
  3. Step 3: Cross multiply
    392,893.60x = 542,196.90 × 223,128.94
  4. Step 4: Simplify right side
    392,893.60x = 120,979,819,568.29
  5. Step 5: Solve for x
    x = 120,979,819,568.29/392,893.60
  6. Step 6: Final answer
    x = 307,920.06

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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.