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Finding the Fourth Proportional to 634.51, 881.68 and 627.76

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Solution

The fourth proportional to 634.51, 881.68 and 627.76 is: 872.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.51 : 881.68 = 627.76 : x
  2. Step 2: Convert to fraction form
    634.51/881.68 = 627.76/x
  3. Step 3: Cross multiply
    634.51x = 881.68 × 627.76
  4. Step 4: Simplify right side
    634.51x = 553,483.44
  5. Step 5: Solve for x
    x = 553,483.44/634.51
  6. Step 6: Final answer
    x = 872.30

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.