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Finding the Fourth Proportional to 611.49, 845.07 and 500.79

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Solution

The fourth proportional to 611.49, 845.07 and 500.79 is: 692.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.49 : 845.07 = 500.79 : x
  2. Step 2: Convert to fraction form
    611.49/845.07 = 500.79/x
  3. Step 3: Cross multiply
    611.49x = 845.07 × 500.79
  4. Step 4: Simplify right side
    611.49x = 423,202.61
  5. Step 5: Solve for x
    x = 423,202.61/611.49
  6. Step 6: Final answer
    x = 692.08

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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.