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Finding the Fourth Proportional to 634.58, 876.55 and 486.95

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Solution

The fourth proportional to 634.58, 876.55 and 486.95 is: 672.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.58 : 876.55 = 486.95 : x
  2. Step 2: Convert to fraction form
    634.58/876.55 = 486.95/x
  3. Step 3: Cross multiply
    634.58x = 876.55 × 486.95
  4. Step 4: Simplify right side
    634.58x = 426,837.00
  5. Step 5: Solve for x
    x = 426,837.00/634.58
  6. Step 6: Final answer
    x = 672.63

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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.