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Finding the Fourth Proportional to 605.11, 907.67 and 388.84

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Solution

The fourth proportional to 605.11, 907.67 and 388.84 is: 583.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.11 : 907.67 = 388.84 : x
  2. Step 2: Convert to fraction form
    605.11/907.67 = 388.84/x
  3. Step 3: Cross multiply
    605.11x = 907.67 × 388.84
  4. Step 4: Simplify right side
    605.11x = 352,938.40
  5. Step 5: Solve for x
    x = 352,938.40/605.11
  6. Step 6: Final answer
    x = 583.26

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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.