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Finding the Fourth Proportional to 310.93, 466.57 and 128.45

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Solution

The fourth proportional to 310.93, 466.57 and 128.45 is: 192.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.93 : 466.57 = 128.45 : x
  2. Step 2: Convert to fraction form
    310.93/466.57 = 128.45/x
  3. Step 3: Cross multiply
    310.93x = 466.57 × 128.45
  4. Step 4: Simplify right side
    310.93x = 59,932.24
  5. Step 5: Solve for x
    x = 59,932.24/310.93
  6. Step 6: Final answer
    x = 192.75

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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.