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Finding the Fourth Proportional to 922.84, 1,383.60 and 511.72

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Solution

The fourth proportional to 922.84, 1,383.60 and 511.72 is: 767.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.84 : 1,383.60 = 511.72 : x
  2. Step 2: Convert to fraction form
    922.84/1,383.60 = 511.72/x
  3. Step 3: Cross multiply
    922.84x = 1,383.60 × 511.72
  4. Step 4: Simplify right side
    922.84x = 708,015.79
  5. Step 5: Solve for x
    x = 708,015.79/922.84
  6. Step 6: Final answer
    x = 767.21

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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.