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Finding the Fourth Proportional to 605.12, 907.88 and 280.51

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Solution

The fourth proportional to 605.12, 907.88 and 280.51 is: 420.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.12 : 907.88 = 280.51 : x
  2. Step 2: Convert to fraction form
    605.12/907.88 = 280.51/x
  3. Step 3: Cross multiply
    605.12x = 907.88 × 280.51
  4. Step 4: Simplify right side
    605.12x = 254,665.75
  5. Step 5: Solve for x
    x = 254,665.75/605.12
  6. Step 6: Final answer
    x = 420.86

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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.