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Finding the Fourth Proportional to 391,808.80, 587,713.20 and 265,837.60

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Solution

The fourth proportional to 391,808.80, 587,713.20 and 265,837.60 is: 398,756.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,808.80 : 587,713.20 = 265,837.60 : x
  2. Step 2: Convert to fraction form
    391,808.80/587,713.20 = 265,837.60/x
  3. Step 3: Cross multiply
    391,808.80x = 587,713.20 × 265,837.60
  4. Step 4: Simplify right side
    391,808.80x = 156,236,266,576.32
  5. Step 5: Solve for x
    x = 156,236,266,576.32/391,808.80
  6. Step 6: Final answer
    x = 398,756.40

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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.