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Finding the Fourth Proportional to 611.39, 843.03 and 500.54

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Solution

The fourth proportional to 611.39, 843.03 and 500.54 is: 690.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.39 : 843.03 = 500.54 : x
  2. Step 2: Convert to fraction form
    611.39/843.03 = 500.54/x
  3. Step 3: Cross multiply
    611.39x = 843.03 × 500.54
  4. Step 4: Simplify right side
    611.39x = 421,966.02
  5. Step 5: Solve for x
    x = 421,966.02/611.39
  6. Step 6: Final answer
    x = 690.17

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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.