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Finding the Fourth Proportional to 417,692.20, 626,619.10 and 168,399.40

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Solution

The fourth proportional to 417,692.20, 626,619.10 and 168,399.40 is: 252,631.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,692.20 : 626,619.10 = 168,399.40 : x
  2. Step 2: Convert to fraction form
    417,692.20/626,619.10 = 168,399.40/x
  3. Step 3: Cross multiply
    417,692.20x = 626,619.10 × 168,399.40
  4. Step 4: Simplify right side
    417,692.20x = 105,522,280,468.54
  5. Step 5: Solve for x
    x = 105,522,280,468.54/417,692.20
  6. Step 6: Final answer
    x = 252,631.68

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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.