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Finding the Fourth Proportional to 636.65, 877.79 and 503.60

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Solution

The fourth proportional to 636.65, 877.79 and 503.60 is: 694.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.65 : 877.79 = 503.60 : x
  2. Step 2: Convert to fraction form
    636.65/877.79 = 503.60/x
  3. Step 3: Cross multiply
    636.65x = 877.79 × 503.60
  4. Step 4: Simplify right side
    636.65x = 442,048.14
  5. Step 5: Solve for x
    x = 442,048.14/636.65
  6. Step 6: Final answer
    x = 694.34

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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.