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Finding the Fourth Proportional to 933.18, 1,287.99 and 622.50

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Solution

The fourth proportional to 933.18, 1,287.99 and 622.50 is: 859.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.18 : 1,287.99 = 622.50 : x
  2. Step 2: Convert to fraction form
    933.18/1,287.99 = 622.50/x
  3. Step 3: Cross multiply
    933.18x = 1,287.99 × 622.50
  4. Step 4: Simplify right side
    933.18x = 801,773.78
  5. Step 5: Solve for x
    x = 801,773.78/933.18
  6. Step 6: Final answer
    x = 859.18

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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.