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Finding the Fourth Proportional to 922.38, 1,384.17 and 345.25

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Solution

The fourth proportional to 922.38, 1,384.17 and 345.25 is: 518.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.38 : 1,384.17 = 345.25 : x
  2. Step 2: Convert to fraction form
    922.38/1,384.17 = 345.25/x
  3. Step 3: Cross multiply
    922.38x = 1,384.17 × 345.25
  4. Step 4: Simplify right side
    922.38x = 477,884.69
  5. Step 5: Solve for x
    x = 477,884.69/922.38
  6. Step 6: Final answer
    x = 518.10

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Double scale
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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.