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Finding the Fourth Proportional to 933.25, 1,287.70 and 634.73

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Solution

The fourth proportional to 933.25, 1,287.70 and 634.73 is: 875.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.25 : 1,287.70 = 634.73 : x
  2. Step 2: Convert to fraction form
    933.25/1,287.70 = 634.73/x
  3. Step 3: Cross multiply
    933.25x = 1,287.70 × 634.73
  4. Step 4: Simplify right side
    933.25x = 817,341.82
  5. Step 5: Solve for x
    x = 817,341.82/933.25
  6. Step 6: Final answer
    x = 875.80

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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.