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Finding the Fourth Proportional to 391,279.20, 586,918.80 and 364,840.80

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Solution

The fourth proportional to 391,279.20, 586,918.80 and 364,840.80 is: 547,261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,279.20 : 586,918.80 = 364,840.80 : x
  2. Step 2: Convert to fraction form
    391,279.20/586,918.80 = 364,840.80/x
  3. Step 3: Cross multiply
    391,279.20x = 586,918.80 × 364,840.80
  4. Step 4: Simplify right side
    391,279.20x = 214,131,924,527.04
  5. Step 5: Solve for x
    x = 214,131,924,527.04/391,279.20
  6. Step 6: Final answer
    x = 547,261.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.