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Finding the Fourth Proportional to 393,692.40, 543,295.64 and 230,380.30

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Solution

The fourth proportional to 393,692.40, 543,295.64 and 230,380.30 is: 317,924.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,692.40 : 543,295.64 = 230,380.30 : x
  2. Step 2: Convert to fraction form
    393,692.40/543,295.64 = 230,380.30/x
  3. Step 3: Cross multiply
    393,692.40x = 543,295.64 × 230,380.30
  4. Step 4: Simplify right side
    393,692.40x = 125,164,611,749.60
  5. Step 5: Solve for x
    x = 125,164,611,749.60/393,692.40
  6. Step 6: Final answer
    x = 317,924.89

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1.5x scale

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.