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Finding the Fourth Proportional to 933.03, 1,287.16 and 633.91

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Solution

The fourth proportional to 933.03, 1,287.16 and 633.91 is: 874.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.03 : 1,287.16 = 633.91 : x
  2. Step 2: Convert to fraction form
    933.03/1,287.16 = 633.91/x
  3. Step 3: Cross multiply
    933.03x = 1,287.16 × 633.91
  4. Step 4: Simplify right side
    933.03x = 815,938.79
  5. Step 5: Solve for x
    x = 815,938.79/933.03
  6. Step 6: Final answer
    x = 874.50

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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.