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Finding the Fourth Proportional to 374.80, 516.72 and 316.48

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Solution

The fourth proportional to 374.80, 516.72 and 316.48 is: 436.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.80 : 516.72 = 316.48 : x
  2. Step 2: Convert to fraction form
    374.80/516.72 = 316.48/x
  3. Step 3: Cross multiply
    374.80x = 516.72 × 316.48
  4. Step 4: Simplify right side
    374.80x = 163,531.55
  5. Step 5: Solve for x
    x = 163,531.55/374.80
  6. Step 6: Final answer
    x = 436.32

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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.