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Finding the Fourth Proportional to 347,276.40, 520,914.60 and 84,620.40

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Solution

The fourth proportional to 347,276.40, 520,914.60 and 84,620.40 is: 126,930.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,276.40 : 520,914.60 = 84,620.40 : x
  2. Step 2: Convert to fraction form
    347,276.40/520,914.60 = 84,620.40/x
  3. Step 3: Cross multiply
    347,276.40x = 520,914.60 × 84,620.40
  4. Step 4: Simplify right side
    347,276.40x = 44,080,001,817.84
  5. Step 5: Solve for x
    x = 44,080,001,817.84/347,276.40
  6. Step 6: Final answer
    x = 126,930.60

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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.