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Finding the Fourth Proportional to 611.87, 843.42 and 415.04

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Solution

The fourth proportional to 611.87, 843.42 and 415.04 is: 572.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.87 : 843.42 = 415.04 : x
  2. Step 2: Convert to fraction form
    611.87/843.42 = 415.04/x
  3. Step 3: Cross multiply
    611.87x = 843.42 × 415.04
  4. Step 4: Simplify right side
    611.87x = 350,050.93
  5. Step 5: Solve for x
    x = 350,050.93/611.87
  6. Step 6: Final answer
    x = 572.10

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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.