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Finding the Fourth Proportional to 933.01, 1,398.33 and 521.55

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Solution

The fourth proportional to 933.01, 1,398.33 and 521.55 is: 781.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.01 : 1,398.33 = 521.55 : x
  2. Step 2: Convert to fraction form
    933.01/1,398.33 = 521.55/x
  3. Step 3: Cross multiply
    933.01x = 1,398.33 × 521.55
  4. Step 4: Simplify right side
    933.01x = 729,299.01
  5. Step 5: Solve for x
    x = 729,299.01/933.01
  6. Step 6: Final answer
    x = 781.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.