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Finding the Fourth Proportional to 393,397.96, 542,890.98 and 223,667.56

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Solution

The fourth proportional to 393,397.96, 542,890.98 and 223,667.56 is: 308,662.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,397.96 : 542,890.98 = 223,667.56 : x
  2. Step 2: Convert to fraction form
    393,397.96/542,890.98 = 223,667.56/x
  3. Step 3: Cross multiply
    393,397.96x = 542,890.98 × 223,667.56
  4. Step 4: Simplify right side
    393,397.96x = 121,427,100,842.61
  5. Step 5: Solve for x
    x = 121,427,100,842.61/393,397.96
  6. Step 6: Final answer
    x = 308,662.25

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1.5x scale

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.