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Finding the Fourth Proportional to 310.91, 466.58 and 128.33

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Solution

The fourth proportional to 310.91, 466.58 and 128.33 is: 192.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.91 : 466.58 = 128.33 : x
  2. Step 2: Convert to fraction form
    310.91/466.58 = 128.33/x
  3. Step 3: Cross multiply
    310.91x = 466.58 × 128.33
  4. Step 4: Simplify right side
    310.91x = 59,873.24
  5. Step 5: Solve for x
    x = 59,873.24/310.91
  6. Step 6: Final answer
    x = 192.57

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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.