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Finding the Fourth Proportional to 309.56, 464.42 and 93.16

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Solution

The fourth proportional to 309.56, 464.42 and 93.16 is: 139.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.56 : 464.42 = 93.16 : x
  2. Step 2: Convert to fraction form
    309.56/464.42 = 93.16/x
  3. Step 3: Cross multiply
    309.56x = 464.42 × 93.16
  4. Step 4: Simplify right side
    309.56x = 43,265.37
  5. Step 5: Solve for x
    x = 43,265.37/309.56
  6. Step 6: Final answer
    x = 139.76

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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.