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Finding the Fourth Proportional to 297.38, 442 and 280.10

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Solution

The fourth proportional to 297.38, 442 and 280.10 is: 416.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.38 : 442 = 280.10 : x
  2. Step 2: Convert to fraction form
    297.38/442 = 280.10/x
  3. Step 3: Cross multiply
    297.38x = 442 × 280.10
  4. Step 4: Simplify right side
    297.38x = 123,804.20
  5. Step 5: Solve for x
    x = 123,804.20/297.38
  6. Step 6: Final answer
    x = 416.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.