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Finding the Fourth Proportional to 391,869.42, 540,894.72 and 255,923.90

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Solution

The fourth proportional to 391,869.42, 540,894.72 and 255,923.90 is: 353,250.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,869.42 : 540,894.72 = 255,923.90 : x
  2. Step 2: Convert to fraction form
    391,869.42/540,894.72 = 255,923.90/x
  3. Step 3: Cross multiply
    391,869.42x = 540,894.72 × 255,923.90
  4. Step 4: Simplify right side
    391,869.42x = 138,427,883,527.33
  5. Step 5: Solve for x
    x = 138,427,883,527.33/391,869.42
  6. Step 6: Final answer
    x = 353,250.03

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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.