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Finding the Fourth Proportional to 374.32, 516.54 and 243.64

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Solution

The fourth proportional to 374.32, 516.54 and 243.64 is: 336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.32 : 516.54 = 243.64 : x
  2. Step 2: Convert to fraction form
    374.32/516.54 = 243.64/x
  3. Step 3: Cross multiply
    374.32x = 516.54 × 243.64
  4. Step 4: Simplify right side
    374.32x = 125,849.81
  5. Step 5: Solve for x
    x = 125,849.81/374.32
  6. Step 6: Final answer
    x = 336.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.