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Finding the Fourth Proportional to 309.80, 464.30 and 237.30

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Solution

The fourth proportional to 309.80, 464.30 and 237.30 is: 355.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.80 : 464.30 = 237.30 : x
  2. Step 2: Convert to fraction form
    309.80/464.30 = 237.30/x
  3. Step 3: Cross multiply
    309.80x = 464.30 × 237.30
  4. Step 4: Simplify right side
    309.80x = 110,178.39
  5. Step 5: Solve for x
    x = 110,178.39/309.80
  6. Step 6: Final answer
    x = 355.64

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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.