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Finding the Fourth Proportional to 309.42, 464.03 and 155.32

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Solution

The fourth proportional to 309.42, 464.03 and 155.32 is: 232.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.42 : 464.03 = 155.32 : x
  2. Step 2: Convert to fraction form
    309.42/464.03 = 155.32/x
  3. Step 3: Cross multiply
    309.42x = 464.03 × 155.32
  4. Step 4: Simplify right side
    309.42x = 72,071.79
  5. Step 5: Solve for x
    x = 72,071.79/309.42
  6. Step 6: Final answer
    x = 232.93

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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.