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Finding the Fourth Proportional to 634.77, 875.88 and 355.02

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Solution

The fourth proportional to 634.77, 875.88 and 355.02 is: 489.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.77 : 875.88 = 355.02 : x
  2. Step 2: Convert to fraction form
    634.77/875.88 = 355.02/x
  3. Step 3: Cross multiply
    634.77x = 875.88 × 355.02
  4. Step 4: Simplify right side
    634.77x = 310,954.92
  5. Step 5: Solve for x
    x = 310,954.92/634.77
  6. Step 6: Final answer
    x = 489.87

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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.