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Finding the Fourth Proportional to 605.32, 907.47 and 280.30

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Solution

The fourth proportional to 605.32, 907.47 and 280.30 is: 420.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.32 : 907.47 = 280.30 : x
  2. Step 2: Convert to fraction form
    605.32/907.47 = 280.30/x
  3. Step 3: Cross multiply
    605.32x = 907.47 × 280.30
  4. Step 4: Simplify right side
    605.32x = 254,363.84
  5. Step 5: Solve for x
    x = 254,363.84/605.32
  6. Step 6: Final answer
    x = 420.21

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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.