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Finding the Fourth Proportional to 390,793.92, 539,296.56 and 211,945.92

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Solution

The fourth proportional to 390,793.92, 539,296.56 and 211,945.92 is: 292,485.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,793.92 : 539,296.56 = 211,945.92 : x
  2. Step 2: Convert to fraction form
    390,793.92/539,296.56 = 211,945.92/x
  3. Step 3: Cross multiply
    390,793.92x = 539,296.56 × 211,945.92
  4. Step 4: Simplify right side
    390,793.92x = 114,301,705,562.04
  5. Step 5: Solve for x
    x = 114,301,705,562.04/390,793.92
  6. Step 6: Final answer
    x = 292,485.89

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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.