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Finding the Fourth Proportional to 1,128.27, 1,693.01 and 854.29

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Solution

The fourth proportional to 1,128.27, 1,693.01 and 854.29 is: 1,281.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.27 : 1,693.01 = 854.29 : x
  2. Step 2: Convert to fraction form
    1,128.27/1,693.01 = 854.29/x
  3. Step 3: Cross multiply
    1,128.27x = 1,693.01 × 854.29
  4. Step 4: Simplify right side
    1,128.27x = 1,446,317.24
  5. Step 5: Solve for x
    x = 1,446,317.24/1,128.27
  6. Step 6: Final answer
    x = 1,281.89

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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.