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Finding the Fourth Proportional to 391,052.63, 539,527.14 and 218,945.25

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Solution

The fourth proportional to 391,052.63, 539,527.14 and 218,945.25 is: 302,074.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,052.63 : 539,527.14 = 218,945.25 : x
  2. Step 2: Convert to fraction form
    391,052.63/539,527.14 = 218,945.25/x
  3. Step 3: Cross multiply
    391,052.63x = 539,527.14 × 218,945.25
  4. Step 4: Simplify right side
    391,052.63x = 118,126,904,549.09
  5. Step 5: Solve for x
    x = 118,126,904,549.09/391,052.63
  6. Step 6: Final answer
    x = 302,074.19

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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.