Home / 392,905.76-542,213.60-223,141.12

Finding the Fourth Proportional to 392,905.76, 542,213.60 and 223,141.12

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Solution

The fourth proportional to 392,905.76, 542,213.60 and 223,141.12 is: 307,936.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,905.76 : 542,213.60 = 223,141.12 : x
  2. Step 2: Convert to fraction form
    392,905.76/542,213.60 = 223,141.12/x
  3. Step 3: Cross multiply
    392,905.76x = 542,213.60 × 223,141.12
  4. Step 4: Simplify right side
    392,905.76x = 120,990,149,983.23
  5. Step 5: Solve for x
    x = 120,990,149,983.23/392,905.76
  6. Step 6: Final answer
    x = 307,936.82

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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.