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Finding the Fourth Proportional to 636.25, 877.99 and 374.25

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Solution

The fourth proportional to 636.25, 877.99 and 374.25 is: 516.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.25 : 877.99 = 374.25 : x
  2. Step 2: Convert to fraction form
    636.25/877.99 = 374.25/x
  3. Step 3: Cross multiply
    636.25x = 877.99 × 374.25
  4. Step 4: Simplify right side
    636.25x = 328,587.76
  5. Step 5: Solve for x
    x = 328,587.76/636.25
  6. Step 6: Final answer
    x = 516.44

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1.5x scale

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.