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Finding the Fourth Proportional to 1,107.38, 1,528.12 and 609.92

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Solution

The fourth proportional to 1,107.38, 1,528.12 and 609.92 is: 841.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.38 : 1,528.12 = 609.92 : x
  2. Step 2: Convert to fraction form
    1,107.38/1,528.12 = 609.92/x
  3. Step 3: Cross multiply
    1,107.38x = 1,528.12 × 609.92
  4. Step 4: Simplify right side
    1,107.38x = 932,035.82
  5. Step 5: Solve for x
    x = 932,035.82/1,107.38
  6. Step 6: Final answer
    x = 841.66

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.