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Finding the Fourth Proportional to 933.03, 1,396.89 and 521.10

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Solution

The fourth proportional to 933.03, 1,396.89 and 521.10 is: 780.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.03 : 1,396.89 = 521.10 : x
  2. Step 2: Convert to fraction form
    933.03/1,396.89 = 521.10/x
  3. Step 3: Cross multiply
    933.03x = 1,396.89 × 521.10
  4. Step 4: Simplify right side
    933.03x = 727,919.38
  5. Step 5: Solve for x
    x = 727,919.38/933.03
  6. Step 6: Final answer
    x = 780.17

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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.