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Finding the Fourth Proportional to 394,276.80, 553,387.20 and 394,276.80

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Solution

The fourth proportional to 394,276.80, 553,387.20 and 394,276.80 is: 553,387.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,276.80 : 553,387.20 = 394,276.80 : x
  2. Step 2: Convert to fraction form
    394,276.80/553,387.20 = 394,276.80/x
  3. Step 3: Cross multiply
    394,276.80x = 553,387.20 × 394,276.80
  4. Step 4: Simplify right side
    394,276.80x = 218,187,734,376.96
  5. Step 5: Solve for x
    x = 218,187,734,376.96/394,276.80
  6. Step 6: Final answer
    x = 553,387.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.