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Finding the Fourth Proportional to 1,054.51, 1,581.81 and 871.57

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Solution

The fourth proportional to 1,054.51, 1,581.81 and 871.57 is: 1,307.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,054.51 : 1,581.81 = 871.57 : x
  2. Step 2: Convert to fraction form
    1,054.51/1,581.81 = 871.57/x
  3. Step 3: Cross multiply
    1,054.51x = 1,581.81 × 871.57
  4. Step 4: Simplify right side
    1,054.51x = 1,378,658.14
  5. Step 5: Solve for x
    x = 1,378,658.14/1,054.51
  6. Step 6: Final answer
    x = 1,307.39

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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.