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Finding the Fourth Proportional to 558,410.40, 836,692.20 and 321,339.60

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Solution

The fourth proportional to 558,410.40, 836,692.20 and 321,339.60 is: 481,478.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,410.40 : 836,692.20 = 321,339.60 : x
  2. Step 2: Convert to fraction form
    558,410.40/836,692.20 = 321,339.60/x
  3. Step 3: Cross multiply
    558,410.40x = 836,692.20 × 321,339.60
  4. Step 4: Simplify right side
    558,410.40x = 268,862,336,871.12
  5. Step 5: Solve for x
    x = 268,862,336,871.12/558,410.40
  6. Step 6: Final answer
    x = 481,478.03

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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.