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Finding the Fourth Proportional to 1,119.57, 1,679.53 and 571.46

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Solution

The fourth proportional to 1,119.57, 1,679.53 and 571.46 is: 857.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.57 : 1,679.53 = 571.46 : x
  2. Step 2: Convert to fraction form
    1,119.57/1,679.53 = 571.46/x
  3. Step 3: Cross multiply
    1,119.57x = 1,679.53 × 571.46
  4. Step 4: Simplify right side
    1,119.57x = 959,774.39
  5. Step 5: Solve for x
    x = 959,774.39/1,119.57
  6. Step 6: Final answer
    x = 857.27

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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.