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Finding the Fourth Proportional to 931.22, 1,396.82 and 383.01

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Solution

The fourth proportional to 931.22, 1,396.82 and 383.01 is: 574.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    931.22 : 1,396.82 = 383.01 : x
  2. Step 2: Convert to fraction form
    931.22/1,396.82 = 383.01/x
  3. Step 3: Cross multiply
    931.22x = 1,396.82 × 383.01
  4. Step 4: Simplify right side
    931.22x = 534,994.11
  5. Step 5: Solve for x
    x = 534,994.11/931.22
  6. Step 6: Final answer
    x = 574.51

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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.