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Finding the Fourth Proportional to 605.76, 834.95 and 428.78

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Solution

The fourth proportional to 605.76, 834.95 and 428.78 is: 591.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.76 : 834.95 = 428.78 : x
  2. Step 2: Convert to fraction form
    605.76/834.95 = 428.78/x
  3. Step 3: Cross multiply
    605.76x = 834.95 × 428.78
  4. Step 4: Simplify right side
    605.76x = 358,003.54
  5. Step 5: Solve for x
    x = 358,003.54/605.76
  6. Step 6: Final answer
    x = 591.00

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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.