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Finding the Fourth Proportional to 398,789.96, 550,310.68 and 237,641.40

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Solution

The fourth proportional to 398,789.96, 550,310.68 and 237,641.40 is: 327,933.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,789.96 : 550,310.68 = 237,641.40 : x
  2. Step 2: Convert to fraction form
    398,789.96/550,310.68 = 237,641.40/x
  3. Step 3: Cross multiply
    398,789.96x = 550,310.68 × 237,641.40
  4. Step 4: Simplify right side
    398,789.96x = 130,776,600,430.15
  5. Step 5: Solve for x
    x = 130,776,600,430.15/398,789.96
  6. Step 6: Final answer
    x = 327,933.53

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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.