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Finding the Fourth Proportional to 605.98, 910.51 and 386.71

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Solution

The fourth proportional to 605.98, 910.51 and 386.71 is: 581.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.98 : 910.51 = 386.71 : x
  2. Step 2: Convert to fraction form
    605.98/910.51 = 386.71/x
  3. Step 3: Cross multiply
    605.98x = 910.51 × 386.71
  4. Step 4: Simplify right side
    605.98x = 352,100.08
  5. Step 5: Solve for x
    x = 352,100.08/605.98
  6. Step 6: Final answer
    x = 581.04

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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.