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Finding the Fourth Proportional to 354,450.80, 531,215.40 and 255,839.60

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Solution

The fourth proportional to 354,450.80, 531,215.40 and 255,839.60 is: 383,426.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,450.80 : 531,215.40 = 255,839.60 : x
  2. Step 2: Convert to fraction form
    354,450.80/531,215.40 = 255,839.60/x
  3. Step 3: Cross multiply
    354,450.80x = 531,215.40 × 255,839.60
  4. Step 4: Simplify right side
    354,450.80x = 135,905,935,449.84
  5. Step 5: Solve for x
    x = 135,905,935,449.84/354,450.80
  6. Step 6: Final answer
    x = 383,426.80

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1.5x scale

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.