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Finding the Fourth Proportional to 922.10, 1,383.15 and 436.10

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Solution

The fourth proportional to 922.10, 1,383.15 and 436.10 is: 654.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.10 : 1,383.15 = 436.10 : x
  2. Step 2: Convert to fraction form
    922.10/1,383.15 = 436.10/x
  3. Step 3: Cross multiply
    922.10x = 1,383.15 × 436.10
  4. Step 4: Simplify right side
    922.10x = 603,191.72
  5. Step 5: Solve for x
    x = 603,191.72/922.10
  6. Step 6: Final answer
    x = 654.15

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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.