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Finding the Fourth Proportional to 1,119.39, 1,677.72 and 571.27

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Solution

The fourth proportional to 1,119.39, 1,677.72 and 571.27 is: 856.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.39 : 1,677.72 = 571.27 : x
  2. Step 2: Convert to fraction form
    1,119.39/1,677.72 = 571.27/x
  3. Step 3: Cross multiply
    1,119.39x = 1,677.72 × 571.27
  4. Step 4: Simplify right side
    1,119.39x = 958,431.10
  5. Step 5: Solve for x
    x = 958,431.10/1,119.39
  6. Step 6: Final answer
    x = 856.21

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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.