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Finding the Fourth Proportional to 922.90, 1,383.44 and 511.62

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Solution

The fourth proportional to 922.90, 1,383.44 and 511.62 is: 766.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.90 : 1,383.44 = 511.62 : x
  2. Step 2: Convert to fraction form
    922.90/1,383.44 = 511.62/x
  3. Step 3: Cross multiply
    922.90x = 1,383.44 × 511.62
  4. Step 4: Simplify right side
    922.90x = 707,795.57
  5. Step 5: Solve for x
    x = 707,795.57/922.90
  6. Step 6: Final answer
    x = 766.93

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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.