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Finding the Fourth Proportional to 900, 1,349.68 and 413.44

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Solution

The fourth proportional to 900, 1,349.68 and 413.44 is: 620.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    900 : 1,349.68 = 413.44 : x
  2. Step 2: Convert to fraction form
    900/1,349.68 = 413.44/x
  3. Step 3: Cross multiply
    900x = 1,349.68 × 413.44
  4. Step 4: Simplify right side
    900x = 558,011.70
  5. Step 5: Solve for x
    x = 558,011.70/900
  6. Step 6: Final answer
    x = 620.01

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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.