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Finding the Fourth Proportional to 279,873.21, 386,226.80 and 152,548.50

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Solution

The fourth proportional to 279,873.21, 386,226.80 and 152,548.50 is: 210,517.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,873.21 : 386,226.80 = 152,548.50 : x
  2. Step 2: Convert to fraction form
    279,873.21/386,226.80 = 152,548.50/x
  3. Step 3: Cross multiply
    279,873.21x = 386,226.80 × 152,548.50
  4. Step 4: Simplify right side
    279,873.21x = 58,918,318,999.80
  5. Step 5: Solve for x
    x = 58,918,318,999.80/279,873.21
  6. Step 6: Final answer
    x = 210,517.89

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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.