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Finding the Fourth Proportional to 392,953.50, 542,275.83 and 214,105.50

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Solution

The fourth proportional to 392,953.50, 542,275.83 and 214,105.50 is: 295,465.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,953.50 : 542,275.83 = 214,105.50 : x
  2. Step 2: Convert to fraction form
    392,953.50/542,275.83 = 214,105.50/x
  3. Step 3: Cross multiply
    392,953.50x = 542,275.83 × 214,105.50
  4. Step 4: Simplify right side
    392,953.50x = 116,104,237,720.07
  5. Step 5: Solve for x
    x = 116,104,237,720.07/392,953.50
  6. Step 6: Final answer
    x = 295,465.59

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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.