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Finding the Fourth Proportional to 1,134.36, 1,565.48 and 854.09

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Solution

The fourth proportional to 1,134.36, 1,565.48 and 854.09 is: 1,178.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,134.36 : 1,565.48 = 854.09 : x
  2. Step 2: Convert to fraction form
    1,134.36/1,565.48 = 854.09/x
  3. Step 3: Cross multiply
    1,134.36x = 1,565.48 × 854.09
  4. Step 4: Simplify right side
    1,134.36x = 1,337,060.81
  5. Step 5: Solve for x
    x = 1,337,060.81/1,134.36
  6. Step 6: Final answer
    x = 1,178.69

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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.