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Finding the Fourth Proportional to 1,036.54, 1,428.90 and 849.72

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Solution

The fourth proportional to 1,036.54, 1,428.90 and 849.72 is: 1,171.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.54 : 1,428.90 = 849.72 : x
  2. Step 2: Convert to fraction form
    1,036.54/1,428.90 = 849.72/x
  3. Step 3: Cross multiply
    1,036.54x = 1,428.90 × 849.72
  4. Step 4: Simplify right side
    1,036.54x = 1,214,164.91
  5. Step 5: Solve for x
    x = 1,214,164.91/1,036.54
  6. Step 6: Final answer
    x = 1,171.36

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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.