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Finding the Fourth Proportional to 346.20, 516.66 and 305.16

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Solution

The fourth proportional to 346.20, 516.66 and 305.16 is: 455.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.20 : 516.66 = 305.16 : x
  2. Step 2: Convert to fraction form
    346.20/516.66 = 305.16/x
  3. Step 3: Cross multiply
    346.20x = 516.66 × 305.16
  4. Step 4: Simplify right side
    346.20x = 157,663.97
  5. Step 5: Solve for x
    x = 157,663.97/346.20
  6. Step 6: Final answer
    x = 455.41

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.