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Finding the Fourth Proportional to 634.98, 877.05 and 480.42

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Solution

The fourth proportional to 634.98, 877.05 and 480.42 is: 663.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.98 : 877.05 = 480.42 : x
  2. Step 2: Convert to fraction form
    634.98/877.05 = 480.42/x
  3. Step 3: Cross multiply
    634.98x = 877.05 × 480.42
  4. Step 4: Simplify right side
    634.98x = 421,352.36
  5. Step 5: Solve for x
    x = 421,352.36/634.98
  6. Step 6: Final answer
    x = 663.57

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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.