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Finding the Fourth Proportional to 922.04, 1,383.38 and 428.68

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Solution

The fourth proportional to 922.04, 1,383.38 and 428.68 is: 643.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.04 : 1,383.38 = 428.68 : x
  2. Step 2: Convert to fraction form
    922.04/1,383.38 = 428.68/x
  3. Step 3: Cross multiply
    922.04x = 1,383.38 × 428.68
  4. Step 4: Simplify right side
    922.04x = 593,024.95
  5. Step 5: Solve for x
    x = 593,024.95/922.04
  6. Step 6: Final answer
    x = 643.17

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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.